A suppressor tax stamp is a federal tax paid to the U.S. government for the legal purchase of NFA (National Firearms Act) items, including silencers, short-barreled rifles (SBRs), and machine guns.
This tax is required by the ATF (Bureau of Alcohol, Tobacco, Firearms and Explosives) as part of the approval process for Form 4 submissions.
Starting January 1, 2026, under the Big Beautiful Bill, all tax stamps are included at no additional cost — making the effective tax stamp price $0.
As of August 13, 2026, following the Silencer Shop Foundation v. ATF ruling, customers in free states purchasing suppressors or AOWs that originated from Silencer Shop no longer need to file a Form 4 at all — the registration requirement itself is gone. Only a 4473 and NICS background check are required. Customers in NFA states still require a Form 4 under state law.