Texas prohibited weapons defense

The Section 46.05 statutory list — what is actually prohibited

Texas Penal Code § 46.05 lists nine specific prohibited weapon categories: explosive weapons, machineguns, short-barrel firearms, silencers (without NFA registration), armor-piercing ammunition, chemical dispensing devices, zip guns, tire deflation devices, and improvised explosive devices. Knives and brass knuckles are no longer on the list.

§ 46.05(a)(1) — Explosive weapon

Any explosive or incendiary bomb, grenade, rocket, or mine designed or used for inflicting serious bodily injury, death, or substantial property damage — or for the principal purpose of causing such damage. The definition tracks the federal "destructive device" category at 26 U.S.C. § 5845(f) but is not identical. Improvised pipe bombs, military ordnance, and home-built incendiary devices fall here.

§ 46.05(a)(2) — Machinegun

Tracks the NFA definition at 26 U.S.C. § 5845(b) — a firearm that shoots automatically more than one shot per trigger pull. Staples v. United States, 511 U.S. 600 (1994), held that the federal version of this offense requires proof that the defendant knew the weapon had the automatic-fire characteristic — not merely that it functioned automatically. Conversion parts (auto sears, drop-in conversion kits, Glock switches) raise both the substantive offense and a knowledge problem.

§ 46.05(a)(3) — Short-barrel firearm

A short-barrel firearm as defined at § 46.01(10) — a rifle with barrel under 16 inches or overall length under 26 inches, or a shotgun with barrel under 18 inches or overall length under 26 inches. Measurement disputes are litigable — the proper barrel measurement runs from the closed bolt face to the muzzle, and weapons with permanently attached muzzle devices can exceed the threshold by inches.

§ 46.05(a)(4) — Firearm silencer (unregistered)

Defined by reference to 18 U.S.C. § 921(a)(24) — any device for silencing, muffling, or diminishing the report of a portable firearm. Critically, § 46.05(d) provides an affirmative defense for NFA-registered silencers; HB 957 (2021) further recognizes lawfully manufactured silencers in Texas. A federally registered suppressor is therefore NOT prohibited under Texas law.

§ 46.05(a)(5) — Armor-piercing ammunition

Armor-piercing ammunition as defined at § 46.01(12) — handgun ammunition designed primarily to penetrate metal or body armor. The Texas definition (design intent) differs from the federal definition at 18 U.S.C. § 921(a)(17)(B) (bullet composition). Defense litigation often turns on whether prosecution-claimed ammunition actually meets the design-intent threshold of the Texas statute. Wright v. State, 982 S.W.2d 916 (Tex. App.—Houston [14th Dist.] 1998), addresses the element.

§ 46.05(a)(6) — Chemical dispensing device

A device designed to release a chemical that could cause serious bodily injury or death — explicitly excluding small-quantity personal pepper-spray devices intended for self-defense (which are governed by § 46.01(14) and remain lawful for adults). The dividing line is purpose, quantity, and intended use — industrial chemical-release devices and military CS canisters fall on the prohibited side.

§ 46.05(a)(7) — Zip gun

A device or combination of devices not commercially produced as a firearm but capable of, or readily convertible into, expelling a projectile by use of an explosive — typically improvised single-shot designs constructed from pipe, tubing, and a firing mechanism. Often charged alongside § 46.05(a)(9) IED counts when the improvised device combines projectile and explosive elements.

§ 46.05(a)(8) — Tire deflation device

Any device, including a caltrop or a stop stick, designed to puncture vehicle tires. The lone state-jail felony grade in § 46.05 — punishable by 180 days to 2 years in a state jail facility under § 12.35. Excluded: stop sticks deployed by law enforcement or governmental agencies, which are authorized use.

§ 46.05(a)(9) — Improvised explosive device

Any device designed, made, or adapted for the purpose of inflicting serious bodily injury or death through the release, dissemination, or impact of toxic or poisonous chemicals, biological or radiological agents, or explosives. Added by post-9/11 legislative amendment; substantially overlaps with the § 46.05(a)(1) "explosive weapon" category. The two are sometimes charged in the alternative.

Two categories prior to 2019 — brass knuckles/clubs and switchblade knives — are no longer prohibited under § 46.05. HB 1791 (85th Leg., R.S., effective September 1, 2017) legalized switchblade knives by removing them from the prohibited-weapons list. HB 446 (86th Leg., R.S., effective September 1, 2019) legalized brass knuckles, certain clubs, and most other knives. Texas now classifies these as ordinary weapons, lawful to possess and carry, subject to location-based restrictions under § 46.03 for "location-restricted knives" (knives with blades over 5.5 inches) on certain premises. Counsel must immediately verify the offense-date version of the statute — a § 46.05 charge predicated on switchblade or brass-knuckles possession after the effective dates is no longer a viable prosecution.

The categories that remain on the prohibited list reflect a deliberate legislative judgment that certain weapon types pose risks beyond ordinary self-defense or hunting utility — explosive ordnance, automatic-fire weapons, weapons designed for concealment or assassination (zip guns, sound suppressors), weapons designed to defeat body armor or vehicles, and improvised devices designed for mass harm. The list is enumerated, not open-ended — a weapon not falling within one of the nine categories cannot be prohibited under § 46.05, no matter how unusual or alarming it may seem to the arresting officer.

What actually counts as a prohibited weapon — the classification problem

Most § 46.05 prosecutions turn on whether the seized item actually fits its claimed statutory category. Barrel measurements, automatic-fire characteristic, ammunition design intent, and silencer-vs-muffler distinctions are all technically litigable — and ATF examination findings frequently disagree with arresting-officer assumptions.

The single most-litigated layer of any prohibited-weapons defense is whether the item the State seized actually meets the statutory definition. A "machinegun" prosecution requires proof that the weapon fires automatically — more than one shot per trigger function — which the State typically establishes through ATF test-fire findings under controlled conditions. Conversion-part prosecutions (auto sears, Glock switches, lightning links) require proof that the part renders the host firearm capable of automatic fire when assembled — and depending on the specific conversion device, this may be a question for an ATF Firearms Technology Branch examiner, not the arresting officer. Garland v. Cargill, 602 U.S. 406 (2024), held that bump stocks do not satisfy the statutory machinegun definition because they do not enable multiple shots per single function of the trigger — a holding that voided the ATF's 2018 bump-stock rule and reshaped the classification analysis for any rapid-fire accessory.

A "short-barrel firearm" prosecution requires a barrel-length measurement performed correctly. The proper measurement protocol — bolt face (closed) to the muzzle of the barrel — is set out in ATF Ruling 79-1 and ATF Procedure 2018-1. Officers occasionally measure from outside the receiver or include muzzle devices that are not permanently attached. Permanently attached muzzle devices (welded, blind-pinned, or silver-soldered with sufficient temperature) count toward barrel length; threaded or screw-on devices do not. A weapon measured by the arresting officer at 15.75 inches may, on proper measurement with a permanently attached compensator counted, exceed the 16-inch threshold — defeating the prosecution.

An "armor-piercing ammunition" prosecution requires proof that the ammunition was designed primarily to penetrate metal or body armor under the Texas § 46.01(12) definition. Wright v. State, 982 S.W.2d 916 (Tex. App.—Houston [14th Dist.] 1998), addressed the element — the State must establish design intent, not merely that the ammunition is capable of penetrating armor. Many common hunting rounds will penetrate soft body armor without having been designed for that purpose. Steel-core military surplus ammunition (e.g., 7.62×39mm steel-core) and tungsten-penetrator handgun ammunition (e.g., KTW or THV rounds) typically meet the design-intent standard; common rifle ammunition typically does not. ATF examination of the recovered ammunition is the State's normal proof path, and defense counsel can retain an independent ballistics expert to challenge findings.

A "firearm silencer" prosecution requires proof that the device meets the federal § 921(a)(24) definition — a device for silencing, muffling, or diminishing the report of a portable firearm. Items marketed as "solvent traps" or "muffler cores" sit on the legal edge: a solvent trap is not a silencer; a solvent trap drilled out and assembled as a baffle stack is. The intent and the physical configuration both matter. United States v. Crooker, 608 F.3d 94 (1st Cir. 2010), addresses the silencer-vs-muffler distinction. Beyond classification, the affirmative defense under § 46.05(d) for federally registered silencers is the dominant defense pathway — once registered, the suppressor is not prohibited under Texas law at all.

A "chemical dispensing device" prosecution requires distinguishing a § 46.05(a)(6) prohibited device from a § 46.01(14) lawful self-defense device. Personal pepper spray and small-quantity OC devices (typically under 2 ounces, designed for personal carry) are lawful for adults to possess and use in Texas. Larger industrial dispensers, military-grade CS canisters, and homemade chemical-release devices fall within the prohibited category. The State's proof must show both that the device exceeds the personal-use exception and that the chemical it releases could cause serious bodily injury or death. A defense expert can analyze the chemical contents and the dispersal mechanism — many seizures involve items that turn out to be lawful personal-defense devices on proper analysis.

The federal NFA overlap — how state and federal interact

Federal NFA registration (26 U.S.C. §§ 5841–5872) creates a Texas affirmative defense under § 46.05(d) for machineguns, short-barrel firearms, and silencers. But unregistered NFA possession violates both Texas § 46.05 AND federal § 5861(d) — 10-year federal exposure. Federal AUSAs often defer to state on smaller cases; pickup is more likely with stolen, trafficked, or drug-overlap weapons.

The relationship between Texas § 46.05 and federal NFA registration is the single most important doctrinal point in prohibited-weapons defense. Section 46.05(d) provides that it is an affirmative defense to a prosecution under § 46.05(a) for machinegun, short-barrel firearm, or silencer if the actor's possession was pursuant to registration in the National Firearms Act National Firearms Registration and Transfer Record. The affirmative defense is real — a properly NFA-registered machinegun, SBR, SBS, or silencer is not prohibited under Texas law. The defense bears the burden of producing the registration documentation (Form 4 transfer record, ATF tax stamp), but once produced the defense is dispositive on the prohibited-weapons element.

The corollary is equally important: a weapon that should have been NFA-registered but was not is illegal under BOTH Texas § 46.05 AND federal 26 U.S.C. § 5861(d). The same possession constitutes two separate criminal offenses in two different jurisdictions. The federal offense carries up to 10 years in federal prison plus a $250,000 fine under § 5871. The Texas offense carries 2 to 10 years in state prison plus up to a $10,000 fine for the third-degree felony grade. Both prosecutions can proceed simultaneously; the Double Jeopardy Clause does not bar separate state and federal prosecutions for the same conduct under Bartkus v. Illinois, 359 U.S. 121 (1959), and Gamble v. United States, 587 U.S. 678 (2019).

United States v. Freed, 401 U.S. 601 (1971), held that § 5861(d) is a strict-liability offense as to the registration element — the defendant's belief that the item was registered is no defense. But Staples v. United States, 511 U.S. 600 (1994), and Rogers v. United States, 522 U.S. 252 (1998), carved out a knowledge requirement on the physical-characteristics element. In a federal machinegun prosecution under § 5861(d), the government must prove the defendant knew the weapon had the automatic-fire characteristic. In a federal silencer prosecution, the government must prove the defendant knew the device was a silencer. Texas § 46.05 prosecutions in state court tend to track the federal knowledge framework on the physical-characteristics element while applying the § 46.05(d) registration affirmative defense to the registration question. Counsel handling parallel state-federal prohibited-weapons matters must coordinate the knowledge framing across both forums.

Federal pickup of a Texas § 46.05 case turns on a small set of factors. The U.S. Attorney's Office for the Northern District of Texas does not pick up every unregistered-NFA case — federal resources are limited, and many small-scale possessions resolve at the state level. Federal interest rises sharply when: (a) the weapon is stolen, particularly from a federal firearms licensee; (b) the weapon was trafficked across state lines, implicating 18 U.S.C. § 922(a)(3); (c) the possession is paired with drug trafficking, in which case § 924(c) creates an additional 5-year mandatory-minimum consecutive count; (d) the defendant is a federal felon-in-possession subject to § 922(g)(1); or (e) the device is an explosive or destructive device with serious public-safety implications. State counsel must audit federal pickup risk from the first interview onward — what is said to state investigators can be used in any subsequent federal proceeding, and federal cooperation timing decisions cannot be deferred.

Garland v. Cargill, 602 U.S. 406 (2024), reshaped the federal-state classification landscape by holding that ATF's 2018 bump-stock rule exceeded statutory authority — bump stocks do not satisfy the machinegun definition because they do not enable multiple shots per single function of the trigger. After Cargill, bump-stock possession is not a federal NFA offense and not a Texas § 46.05(a)(2) machinegun offense. Other rapid-fire accessories — forced-reset triggers, binary triggers, certain "Wall of Guns"–style conversion parts — remain in active litigation and ATF classification dispute. Counsel handling any rapid-fire-accessory prosecution must check the current ATF classification status, the pending litigation posture, and any executive-branch policy shifts before settling on a defense theory.

Penalty grades across § 46.05

Most § 46.05 offenses are third-degree felonies (2–10 years, up to $10,000 fine). Tire deflation devices drop to state-jail felony. NFA-registered machineguns, SBRs, SBSs, and silencers are not offenses under § 46.05(d). Federal § 5861(d) parallel adds up to 10 years on top.

Section 46.05(c) sets the default penalty for possession of an explosive weapon, machinegun, short-barrel firearm, unregistered silencer, armor-piercing ammunition, chemical dispensing device, zip gun, or improvised explosive device at a third-degree felony — 2 to 10 years in the Texas Department of Criminal Justice institutional division and up to a $10,000 fine under § 12.34. The grade is uniform across these eight categories, which simplifies the penalty analysis but makes the classification dispute (does the item actually meet the category) the highest-leverage move in the case.

Section 46.05(e) drops the tire-deflation-device offense to a state-jail felony under § 12.35 — 180 days to 2 years in a state jail facility plus up to a $10,000 fine. State-jail felony is a meaningfully lower exposure level, but conviction still triggers the same federal § 922(g)(1) firearm disability and the same Texas § 46.04 disability. Probation is available at the state-jail-felony level under Code Crim. Proc. art. 42A.054, with possible deferred adjudication.

The affirmative defense under § 46.05(d) is the most powerful provision in the statute. For machineguns, short-barrel firearms, and firearm silencers (the three categories where NFA registration is the dispositive question), an NFA-registered weapon is not a prosecutable § 46.05 offense at all. The defense burden is one of production — the defendant must come forward with the registration documentation — but once produced, the State cannot proceed. Counsel should always order a § 9 search of the National Firearms Registration and Transfer Record at the start of any machinegun, SBR, SBS, or silencer prosecution; the registration record may resolve the case before discovery is complete.

Federal parallel exposure is substantial. Federal NFA possession of an unregistered item under 26 U.S.C. § 5861(d) carries up to 10 years in federal prison plus a $250,000 fine under § 5871. Section 5861(f) — transfer of an unregistered NFA item — carries the same exposure. Federal machinegun possession (regardless of registration) under 18 U.S.C. § 922(o), the post-1986 machinegun ban, can apply where the machinegun was manufactured after May 19, 1986 — a per-se federal offense regardless of NFA registration status. Federal sentencing under the U.S. Sentencing Guidelines for NFA offenses runs USSG § 2K2.1, with offense-level adjustments for prior felony history, weapon type, number of weapons, and use in connection with another felony. A § 924(c) count (use or possession of firearm during and in relation to a crime of violence or drug-trafficking offense) adds a 5-year mandatory-minimum consecutive sentence, with elevations to 7 years (brandished), 10 years (discharged), 25 years (semi-automatic assault weapon or short-barrel rifle), or 30 years (machinegun or destructive device).

Collateral consequences are significant. A § 46.05 felony conviction triggers federal § 922(g)(1) firearm disability for life — independent of any Texas restoration. A conviction may also affect federal employment and security clearance, professional licensing (Texas Medical Board, Texas Real Estate Commission, State Bar, TEA/SBEC for educators), immigration status under 8 U.S.C. § 1227 for lawful permanent residents, and ATF Federal Firearms License eligibility. A § 46.05 conviction is generally treated by federal courts as a "crime of violence" predicate under § 924(c) and as an Armed Career Criminal Act § 924(e) qualifying predicate in subsequent federal cases, which compounds future exposure if the defendant later faces federal felon-in-possession charges.

Defenses we evaluate first

The most powerful § 46.05 defense is the NFA-registration affirmative defense under § 46.05(d). Other workhorse defenses: statutory classification challenges, knowledge of physical characteristics under Staples, Fourth Amendment suppression, constructive-possession affirmative-links analysis, and selective Bruen as-applied challenges.

The single highest-leverage move in any machinegun, short-barrel firearm, or silencer prosecution is the § 46.05(d) NFA-registration affirmative defense. Counsel files a § 9 search request with the ATF's NFA Branch at the start of representation to determine whether the weapon is registered to the defendant or to any predecessor in interest. A registration record produces immediate case-dispositive leverage — the State cannot proceed on the underlying § 46.05(a) count when registration is established. Even when registration is to a previous owner rather than the defendant, the registration record can support a knowledge defense (the defendant believed the weapon was registered) and an affirmative-defense theory at trial.

The second move is the statutory-classification challenge. The State must prove the seized item actually meets its claimed statutory category — automatic-fire characteristic for a machinegun, barrel-length measurement for a short-barrel firearm, design intent for armor-piercing ammunition, silencer-vs-muffler analysis for a silencer, chemical-release capability for a chemical dispensing device. Each category has its own forensic and definitional issues. Garland v. Cargill, 602 U.S. 406 (2024), eliminated the bump-stock category entirely; lower courts continue to work through forced-reset triggers and binary triggers. Defense counsel orders the ATF examination report through Article 39.14 discovery and, in close cases, retains an independent firearms technology expert to challenge the State's classification finding.

The third move is the knowledge defense under Staples v. United States, 511 U.S. 600 (1994), and Rogers v. United States, 522 U.S. 252 (1998). The federal version of the offense requires proof that the defendant knew the weapon had the automatic-fire characteristic (for machineguns) or knew the device was a silencer (for silencers). Texas § 46.05 prosecutions track the same knowledge framework on physical-characteristics elements. Cases involving inherited firearms, mistakenly converted host weapons (the AR-15 that was unknowingly modified by a prior owner), borrowed weapons, and conversion-part possession (auto sears the defendant did not know would convert the host weapon) all support viable knowledge defenses. The State's evidentiary path on knowledge typically relies on circumstantial evidence — possession of conversion tools, internet search history, communications about the conversion — which is often weak in cases where the defendant came into possession innocently.

The fourth move is Fourth Amendment suppression under constructive possession Article 38.23. Many § 46.05 arrests originate in vehicle stops, warrant executions on unrelated charges, or storage-unit and residence searches. The validity of the initial intrusion governs everything that follows. Terry v. Ohio, 392 U.S. 1 (1968), and Arizona v. Gant, 556 U.S. 332 (2009), control vehicle frisks and searches incident to arrest. Riley v. California, 573 U.S. 373 (2014), bars warrantless cell phone searches that often produce the State's circumstantial knowledge evidence. Carpenter v. United States, 585 U.S. 296 (2018), governs historical cell-site location information used to tie the defendant to a storage unit or residence. Rodriguez v. United States, 575 U.S. 348 (2015), bars unconstitutional prolongation. Each layer of the search-and-seizure chain is independently challengeable, and a successful suppression motion typically collapses the entire prosecution.

The fifth move is the constructive-possession attack in multi-occupant scenarios. Section 46.05 prosecutions involving weapons found in shared residences, jointly used storage units, multi-occupant vehicles, or borrowed homes raise the Evans v. State, 202 S.W.3d 158 (Tex. Crim. App. 2006), "affirmative links" question. Factors include: defendant's ownership or right of control over the place; defendant's presence at the time of search; weapon in plain view to defendant; defendant's proximity to the weapon; whether the weapon was conveniently accessible to defendant; defendant's statements connecting him to the weapon; furtive gestures; fingerprint or DNA evidence on the weapon; and prior history. The cumulative-link analysis means that a single weak link does not defeat the State, but the State must marshal multiple links — counsel dismantles linkage on multiple fronts.

The sixth move is the modified-firearm classification dispute, post-Cargill. After Garland v. Cargill, 602 U.S. 406 (2024), bump-stock cases are no longer viable as machinegun prosecutions. Forced-reset triggers (the WOT/Rare Breed FRT-15 class of devices) and binary triggers are in active classification litigation; ATF has issued classification determinations on some devices, but several are pending judicial review post-Cargill. Defense counsel handling any rapid-fire-accessory prosecution must check the current ATF classification posture, the pending litigation status, and any executive-branch policy shifts at the time of the prosecution — the legal landscape is changing month by month.

The seventh move is the Bruen as-applied challenge under New York State Rifle & Pistol Ass'n v. Bruen, 597 U.S. 1 (2022). The Bruen historical-analogue test for firearm regulations has had limited but real impact on § 46.05 prosecutions. United States v. Rahimi, 602 U.S. 680 (2024), upheld the § 922(g)(8) protective-order disarmament against Second Amendment challenge while leaving open as-applied challenges to other categorical disqualifications. Most § 46.05 categories — explosive weapons, machineguns, armor-piercing ammunition, IEDs — track well-established historical analogues for "dangerous and unusual" weapon regulation under District of Columbia v. Heller, 554 U.S. 570 (2008), and are unlikely to fall to Bruen challenge. Suppressor and short-barrel-firearm prohibitions are weaker historically; some federal courts have entertained as-applied challenges to NFA registration requirements for these categories. Counsel should preserve the Bruen issue for appeal in any § 46.05 prosecution, particularly silencer cases. Ex parte Cleveland, 681 S.W.3d 740 (Tex. Crim. App. 2023), addresses Texas post-HB 1927 statutory construction generally; weapons-specific Bruen application in Texas state court remains underdeveloped.

Common prosecution errors in § 46.05 cases

The State's typical errors in § 46.05 prosecutions: charging without ATF classification, failing the § 46.05(d) affirmative-defense audit, conflating bump stocks with machineguns post-Cargill, inadequate barrel measurement, treating constructive possession as automatic, and pursuing post-2017/2019 cases on now-legal knives or brass knuckles.

A pattern of prosecution errors has emerged in DFW dockets. The first and most common error is charging § 46.05 without an ATF firearms-technology classification. Arresting officers occasionally identify items as machineguns, SBRs, or silencers based on visual inspection or assumption, and prosecutors charge before the ATF examination report is back. The classification may not survive expert review — a host firearm that appears converted may not actually function automatically; a barrel that appears short may be at-threshold with a permanently attached muzzle device; a device that appears to be a silencer may be a solvent trap. Counsel's response is an Article 39.14 discovery demand for the ATF report and, where the report has not yet issued, a motion to compel completion before the case proceeds to trial.

The second error is the § 46.05(d) affirmative-defense audit failure. Prosecutors sometimes proceed on machinegun, SBR, SBS, or silencer charges without confirming that the weapon is not registered in the National Firearms Registration and Transfer Record. A NFA registration record produces immediate case-dispositive leverage. Counsel orders the § 9 search at the start of representation and confronts the prosecutor with the registration documentation if found. Many such cases resolve at the first pretrial setting once the affirmative defense is documented.

The third error is the post-Cargill bump-stock prosecution. After Garland v. Cargill, 602 U.S. 406 (2024), bump stocks are not machineguns under § 5845(b) or § 46.05(a)(2). Prosecutors who continue to pursue bump-stock cases on a machinegun theory will lose on a motion to dismiss; the same logic extends to certain rapid-fire devices that the ATF previously classified as machineguns but that face Cargill-style classification challenges post-2024. Counsel's response is a pretrial motion to dismiss the machinegun count, citing Cargill and any post-Cargill federal-court rulings on the specific device at issue.

The fourth error is inadequate barrel measurement in SBR/SBS cases. The State must measure barrel length per ATF Ruling 79-1 and ATF Procedure 2018-1 — bolt face (closed) to muzzle of the barrel, counting permanently attached muzzle devices. Officers occasionally measure incorrectly, fail to account for permanent attachments, or rely on visual estimation. Defense counsel demands the actual measurement documentation in discovery and, in close cases, conducts an independent measurement with photographic documentation. A measurement at or above the 16-inch rifle / 18-inch shotgun threshold defeats the SBR/SBS element.

The fifth error is treating constructive possession as automatic in shared-residence and multi-occupant-vehicle cases. The State must marshal "affirmative links" under Evans v. State, 202 S.W.3d 158 (Tex. Crim. App. 2006), and frequently relies on mere proximity. Defense counsel files a motion to quash for insufficient pleading of the possession element and, at trial, a directed-verdict motion at the close of the State's case where the affirmative-links analysis is thin. Tate v. State, 500 S.W.3d 410 (Tex. App.—Houston [1st Dist.] 2016), and similar cases supply the analytical framework.

The sixth error is prosecution under the pre-2017 or pre-2019 versions of § 46.05 for items that are now lawful. HB 1791 (2017) legalized switchblades; HB 446 (2019) legalized brass knuckles, clubs, and most knives. A § 46.05 prosecution based on a switchblade seized after September 1, 2017, or a brass-knuckles seizure after September 1, 2019, is not viable. Counsel verifies the offense-date version of the statute and, where applicable, files an immediate motion to dismiss. This error is most common in cases involving older offense reports, indictments that were carried over from earlier periods, or arresting officers unfamiliar with the post-2019 statutory landscape.

The seventh recurring error is treating Tucker v. State, 218 S.W.3d 763 (Tex. App.—El Paso 2007), as not controlling on § 46.05 mens rea. Tucker confirmed the implicit knowledge requirement for § 46.05 prosecutions — the State must show the defendant knew of the prohibited characteristics of the weapon. Prosecutors who proceed on a strict-liability theory will face a motion in limine excluding the State from inviting a knowledge inference without evidentiary predicate, and an Article 36.14 jury-charge dispute at trial requiring proper knowledge instruction.

What to do if you're charged with a § 46.05 offense

The first 30 days are decisive: engage counsel, order the § 9 NFA registration search, preserve search-and-seizure evidence, document chain of custody, audit federal pickup risk, and coordinate parallel federal counsel where § 5861(d) exposure exists.

Engage counsel before the first court setting. A § 46.05 case is not a self-representation matter at any grade. The interplay among § 46.05(a) classification elements, the § 46.05(d) NFA affirmative defense, parallel federal § 5861(d) exposure, and § 924(c)/§ 922(g)(1) collateral consequences is too dense for non-lawyer navigation. The single most damaging mistake is to accept a plea offer at first appearance without the NFA registration audit, the classification analysis, and the Fourth Amendment review done first.

Order the § 9 NFA registration search immediately. A § 9 request to the ATF's NFA Branch produces a search of the National Firearms Registration and Transfer Record — confirming whether the seized item is registered to the defendant, to a predecessor in interest, or not at all. A registration hit on a machinegun, SBR, SBS, or silencer case is dispositive on the underlying § 46.05(a) count under the § 46.05(d) affirmative defense. The search takes typically 30 to 60 days to return; counsel should initiate it the same week as engagement to preserve the timeline.

Send a search-and-seizure evidence preservation letter to the arresting agency immediately. Most DFW agencies overwrite body-cam and dash-cam footage on 30-to-90-day cycles. Footage is often dispositive on the Fourth Amendment analysis (what was the actual basis for the stop, frisk, or entry?), the knowledge analysis (did the defendant make admissions, react, or display familiarity with the weapon?), and the chain-of-custody analysis (when and how was the weapon recovered?). A one-page preservation demand citing Trombetta/Youngblood locks the footage in retention.

Document chain of custody from the moment of seizure. The State must establish an unbroken chain from the moment of seizure through evidence-locker storage through ATF examination through trial presentation. Gaps in the chain are dispositive on admissibility under TRE 901. Counsel demands the complete property-and-evidence log via Article 39.14 discovery — every transfer, every signature, every examination request. For ATF examination, the chain extends to the field office, the ATF Firearms Technology Branch, and any return shipping back to the local agency. Storage failures, examination delays, and lost evidence are all dispositive issues if documented.

Audit federal pickup risk on day one. Cases involving stolen NFA items, trafficked weapons, drug-trafficking parallels, or a defendant who is already a federal felon-in-possession subject under § 922(g)(1) carry high federal pickup risk. The U.S. Attorney's Office for the Northern District of Texas may indict in parallel or after-the-fact, and federal § 5861(d) exposure adds 10 years on top of the state matter. State counsel should coordinate with federal counsel from the first interview onward — what is said to state investigators can be used in federal proceedings. The decision on whether to negotiate a global resolution covering both jurisdictions, or to fight state and federal separately, must be made early and made together.

Gather every document related to the chain of acquisition. Where did the weapon come from? Was it inherited? Purchased from a private seller? Bought at a gun show? Acquired in a divorce, estate, or storage-unit auction? Was it transferred with a Form 4 NFA transfer (which would confirm registration)? Was any registration paperwork ever issued and where is it? Each fact maps to a specific defense element — the affirmative defense for NFA items, the knowledge defense under Staples and Tucker, the constructive-possession affirmative-links analysis. Documents and witnesses available at the start of the case may disappear by the time of trial.

Do not give a statement. Recorded jail-cell calls (all Texas county jails record outgoing calls and admit them under TRE 801(e)(2) as party-opponent admissions), post-arrest interviews, and casual booking-room conversations supply the State's strongest evidence on the knowledge element. The Fifth Amendment privilege applies from the moment of arrest forward — invoke it explicitly ("I want to speak with a lawyer") and stay silent thereafter. Statements suggesting familiarity with the weapon's characteristics ("yes, it's a converted one") have lost more § 46.05 cases than weak constructive-possession evidence.

DFW-specific context and cost expectations

DFW counties differ on § 46.05 posture: Collin and Denton firmer; Dallas and Tarrant more open to negotiation on borderline classification cases. Realistic state-defense fees run $5,000–$15,000+; federal parallel adds $20,000–$60,000+. Resolution timelines 6–14 months; federal cases 9–24 months.

Collin County prosecutors take a firm posture on § 46.05 felony charges, particularly for machinegun and explosive-weapon counts. The McKinney District Court dockets handle the bulk of Collin third-degree-felony weapons matters, with Frisco and Plano PD producing most arrests. Diversion availability is limited for felony-level § 46.05 prosecutions; reductions to non-firearm offenses are negotiable when the classification dispute is credible or the suppression record is strong. The Collin County DA's office coordinates with the ATF on federal pickup decisions — counsel must engage early to influence the forum decision.

Denton County mirrors Collin's posture with slightly more flexibility on borderline cases. The Denton County District Court dockets handle § 46.05 felonies; the Justice Center in Lewisville covers the southern county. Denton prosecutors have shown receptiveness to dismissal or reduction in cases where the ATF classification is unfavorable to the State or where the § 46.05(d) NFA-registration affirmative defense is documented. The county's discovery process tends to produce ATF examination reports more rapidly than peer counties.

Dallas County prosecutors are more open to negotiation on borderline classification cases and to reductions to non-firearm offenses when the suppression record is credible. The Dallas County DA operates specialized intake review for felony weapons cases and coordinates with the U.S. Attorney's Office in Dallas on federal pickup. Federal pickup is more frequent in Dallas than in the peer counties for cases involving stolen NFA items, trafficked weapons, or drug-trafficking parallels.

Tarrant County combines firm first-pass plea offers with substantial willingness to negotiate when defense counsel has built a record. The Tarrant County Criminal District Attorney's office runs intake review for felony weapons cases; the Mansfield, Hurst-Euless-Bedford, Arlington, and Fort Worth municipal courts handle the early stages with bind-overs to the District Courts. Tarrant prosecutors are particularly responsive to ATF classification challenges and § 46.05(d) affirmative-defense documentation.

Defense fees for state-level § 46.05 prosecutions vary by complexity. A straightforward third-degree-felony case with no parallel federal exposure, a clear path to plea or charge reduction, and limited motion practice runs $5,000–$8,500 flat-fee. Add classification disputes (independent firearms-technology expert at $2,500–$5,000), contested suppression hearings, and trial preparation and the range moves to $10,000–$15,000+. Trial-ready felony § 46.05 defense — fully prepared for jury trial with all motion practice and expert work — runs $15,000–$25,000+. Federal § 5861(d) parallel exposure can add $20,000–$60,000+ in federal-defense fees on top of the state matter, depending on federal complexity and trial readiness.

Resolution timelines for § 46.05 cases run 6–14 months for state-level matters with substantive motion practice. ATF examination report turnaround typically runs 4–6 months from seizure. § 9 NFA registration search turnaround runs 30–60 days. Trial-ready felony § 46.05 with contested classification or suppression hearings can extend to 14–18 months. Federal § 5861(d) parallel runs its own timeline — federal indictment typically issues 30–120 days after referral in pickup cases, with federal trial readiness at 9–24 months under the Speedy Trial Act framework. State and federal counsel must coordinate calendar and discovery from the outset to preserve cross-jurisdictional defenses and avoid inadvertent waiver.

Outcome distribution is hard to generalize because every § 46.05 case is fact-specific, but typical DFW outcomes cluster as follows. Cases where the § 46.05(d) NFA-registration affirmative defense is established resolve by dismissal at the pretrial stage. Cases where the classification dispute succeeds (ATF examination unfavorable to the State, barrel measurement at-threshold, ammunition design-intent failure) typically resolve by dismissal or charge reduction to a non-§ 46.05 offense. Cases with strong Fourth Amendment suppression theories resolve by dismissal where the suppression motion succeeds. Cases without those leverage points typically resolve by plea to the original charge with a probated or short-confinement sentence, or to a charge reduction to a non-firearm offense (Class A misdemeanor possession of a regulated item, or similar). Outright trial outcomes vary widely with jury composition, classification clarity, and case strength; the variance is driven less by lawyer skill alone than by the underlying facts and the specific § 46.05(a) sub-category at issue.