The Fifth Circuit held in United States v. Comeaux (No. 24-30307) that suppressors are “Arms” protected by the plain text of the Second Amendment. Judge Jerry E. Smith, a 1987 Reagan appointee, wrote the majority opinion. Judges Edith Brown Clement and Stuart Kyle Duncan joined and each filed concurrences. The unanimous panel decision issued June 18, 2026 out of the Western District of Louisiana.

The constitutional reasoning is the consequential part. Smith rejected the government's argument that suppressors fall outside the plain text because they are optional accessories not necessary for a firearm to fire. The opinion frames the test differently: a Second Amendment “Arm” need not be required for the firearm to function, it only needs to facilitate armed self-defense. Smith cataloged the practical functions of a suppressor in that frame. Reduced loudness lowers the risk of permanent hearing damage. Reduced recoil and eliminated muzzle blast support faster, more accurate follow-up shots. Each of those, in the panel's view, is a benefit to lawful armed defense and therefore qualifies the device as an arm.

The panel affirmed the underlying NFA conviction even after holding that suppressors are protected arms. The bridge between those two conclusions is the “shall-issue” doctrine Bruen carved out for state carry-permit regimes. Smith wrote that the NFA's registration and approval pipeline functions as a shall-issue permit: an applicant who meets defined, objective criteria gets the stamp; the agency does not exercise discretionary judgment about the applicant's suitability. On that framing, registration does not burden the Second Amendment right unless the regime is being administered in an abusive way.

Comeaux did not allege abuse. He had manufactured suppressors at home, never submitted a Form 1, and was prosecuted after deputies found the devices during an unrelated search. The shortest version of the holding is in Smith's own words: “Though silencers are Second Amendment ‘Arms,’ because Comeaux has not alleged that the NFA's shall-issue regime has been put toward abusive ends, he has not shown that § 5861(d) burdens his Second Amendment rights.” Conviction affirmed. NFA registration intact in the Fifth Circuit. The doctrinal door opened a long way; the case-specific outcome did not move at all.

2026 is already the most consequential year for civilian suppressor ownership in nearly a century, and Comeaux sharpens the picture. The One Big Beautiful Bill Act, signed July 2025 and effective January 1, 2026, zeroed the federal making and transfer tax on suppressors, SBRs, SBSs, and AOWs. eForm 4 approvals at ATF are running on the order of a few days to a couple of weeks. ATF dropped six deregulatory NPRMs in May 2026 that would gut Form 20 short-term travel approval and end CLEO notification, with comment periods still open. The industry response at SHOT Show 2026 was the largest new-suppressor launch cycle on record. The SHOT Show suppressor boom coverage and the ATF six proposed rules summary both lay out that backdrop in detail.

The Comeaux holding is the constitutional layer on top of that policy and regulatory shift. Tax zeroed by Congress; paperwork cuts proposed by the agency; and now a federal appellate court saying the device itself is constitutionally protected. None of those individually dismantles the NFA. Together they reframe the suppressor as a normal armed-self-defense tool that happens to carry a registration step, rather than a disfavored item the federal government tolerates. Buyers and builders should read the regulatory weather as steady and improving, not as a window that might slam shut. If you are picking a host, the suppressor compatibility basics guide covers thread pitch, gas system, and back-pressure tuning. For 5.56 cans specifically, the best 5.56 suppressors of 2026 guide ranks the current lineup.

The Ninth Circuit held in United States v. DeBorba, decided weeks before Comeaux, that suppressors are firearm accessories that do not fall within the plain text of “Arms.” The reasoning the Ninth Circuit adopted is exactly the framing the Fifth Circuit rejected: a suppressor is optional, the host firearm fires without it, therefore the device is not itself an arm. Two federal appellate courts, on the same statute, on directly comparable facts, in the same calendar quarter, on a threshold Second Amendment question. That is the textbook cert-grant scenario.

The Peterson posture compounds it. The Fifth Circuit panel ruling in United States v. Peterson originally went the opposite direction from Comeaux. After the DOJ shifted position and conceded that suppressors are protected arms, the panel withdrew the opinion. The Fifth Circuit later denied an unopposed motion to stay the mandate, leaving Peterson on track for a possible Supreme Court appeal of his own. A cert grant that takes one of these cases, or consolidates them, would squarely present whether the NFA can regulate items the Constitution protects, and whether the “shall-issue” theory the Fifth Circuit used to save the registration scheme survives at the Supreme Court.

Nothing about Comeaux changes the buying process today. NFA registration is still required, the federal making and transfer tax is $0, eForm 4 approvals are running days, and the eight state bans (CA, DE, HI, IL, MA, NJ, NY, RI) still bar civilian ownership inside those states. Form 4, fingerprints, photos, and the NICS check remain part of the transaction. The right read is that the constitutional doctrine moved while the operational steps stayed the same.

The argument for waiting is thin. A cert grant followed by an opinion striking down NFA registration on suppressors would improve the position of every current owner without harming anyone who bought during the registration era. A cert denial or an opinion upholding the regime leaves buyers exactly where they are today. The worst-case path from buying now is the same as the status quo. The worst-case path from waiting is missing the cheapest, fastest, most permissive federal suppressor window in ninety years. If you are starting from zero, the how-to-buy-a-suppressor guide walks through the trust-versus-individual decision, the eForm 4 submission, and the timeline. For a host platform pre-built for suppressed shooting, the rifle builder lets you spec a barrel, gas system, and muzzle thread that actually meters with the can you pick.

Comeaux is the most important federal appellate suppressor ruling since Bruen. A unanimous Fifth Circuit panel held that suppressors are constitutionally protected arms, and a sister circuit reached the opposite conclusion a few weeks earlier on the same question. The Supreme Court now has the kind of clean split that drives cert grants, and the Peterson case adds a second vehicle to the docket. The constitutional question of whether the NFA can regulate protected items is closer to a definitive answer than it has been at any point in the modern Second Amendment era.

For practical purposes today, nothing changes. Federal registration is still the law, the federal tax is still $0, eForm 4 approvals are still running fast, and state bans still govern eight states. The pragmatic move is to keep building and buying under the current rules while the courts work out the doctrine. If you want to track the regulatory side of this same shift, read our coverage of the six ATF rule proposals and the SHOT Show 2026 suppressor boom. For category-specific buyer guidance, the best 9mm suppressor and best multi-caliber suppressors rankings cover the strongest current options.