Rules and Regulations Library

Title Description Category Document Type
1954-372 - Concealed cane gun (150 KB)

A .410 gauge gun concealed in a cane, or a pistol grip handgun with 8-inch chambered for a .410 gauge shotgun shell, are firearms within the purview of the NFA.  A flare pistol is not a firearm if capable of firing only pyrotechnic shells or cartridges designed for use with it.

Firearms Ruling
1954-247 - Device for trapping animals (75 KB)

A device for trapping animals that fires a special plastic cartridge but is not capable of firing projectiles is not a firearm within the Federal Firearms Act.

Firearms Ruling
1954-245 - A tool powered by blank .22 and .38 cartridges (196 KB)

A tool powered by blank .22 and .38 cartridges which is used for setting studs or driving anchors into masonry or metal is not a firearm within the Federal Firearms Act.

Firearms Ruling
1954-233 - Revolver refitted with a 10-inch barrel (107 KB)

A revolver refitted with a 10-inch barrel and classified as an “any other weapon” and is a firearm under Sec. 2733(a) of the IRC.

Firearms Ruling
Rev. Rul. 54-181 Classification of certain weapons as any other weapon (318 KB)

This ruling advises that certain weapons fall within the definition of an “any other weapon” within the purview of the Federal Firearms Act.

Firearms Ruling
ATF Proc. 2020-1 – Recordkeeping procedure for non-over-the-counter firearm sales by licensees to unlicensed in-state residents that are NICS exempt (169 KB)

This procedure supersedes 2013-2. This ATF procedure gives guidance to licensed importers, manufacturers, and dealers (licensees) on how to complete the Firearms Transaction Record, ATF Form 4473 (Form 4473), as revised effective May 2020, and record the sale of a firearm, when selling to an unlicensed person who (a) Has a valid alternate permit or otherwise is exempt from National Instant Criminal Background Check System (NICS) requirements; (b) Resides in the same State as the licensee; and (c) Does not appear in person at the licensee's business premises.

Rules and Regulations Ruling
ATF Proc. 2020-2 – Recordkeeping and Background Check Procedure for Facilitation of Private Party Firearms Transfers (260 KB)

This procedure supercedes ATF Procedure 2017-1. The purpose of this ATF procedure is to set forth the recordkeeping and National Instant Criminal Background Check System (NICS) procedures for Federal firearms licensees (FFLs) who facilitate the transfer of firearms between private unlicensed individuals. This procedure does not apply to pawn transactions, consignment sales, or repairs.

Rules and Regulations Ruling
1981-4 - Auto Sear (13 KB) The AR15 auto sear is a machinegun as defined by 26 U.S.C. 5845(b). Firearms Ruling
2015-1 - Manufacturing and Gunsmithing (70 KB)
Any person (including any corporation or other legal entity) engaged in the business of performing machining, molding, casting, forging, printing (additive manufacturing) or other manufacturing process to create a firearm frame or receiver, or to make a frame or receiver suitable for use as part of a "weapon … which will or is designed to or may readily be converted to expel a projectile by the action of an explosive," i.e., a "firearm," must be licensed as a manufacturer under the GCA; identify (mark) any such firearm; and maintain required manufacturer’s records. A business (including an association or society) may not avoid the manufacturing license, marking, and recordkeeping requirements of the GCA by allowing persons to perform manufacturing processes on firearms (including frames or receivers) using machinery or equipment under its dominion and control where that business controls access to, and use of, such machinery or equipment. ATF Ruling 2010-10 is clarified.
Firearms Ruling
California-Apr2013-Open Letter-Completing ATF Forms 4473 While Complying with CA DOJ Dealer Record of Sale (DROS) Transaction Procedures (43 KB)
The purpose of this letter is to provide procedures for completing Firearms Transaction Records, ATF Form 4473, while complying with the California Department of Justice (CA DOJ) Dealer Record of Sale (DROS) transaction procedures.
Firearms Open Letter
1975-21 - Construction of Storage Facilities by the Department of Defense - Concrete Floors (14 KB)
Certain explosives storage facilities meeting standards of construction prescribed by the Department of Defense Explosives Safety Board are approved
Explosives Ruling
1977-1 - Gunsmithing at Shooting Events (51 KB) The recordkeeping requirements for licensed gunsmiths are clarified. ATF Rul. 73-13 amplified. Firearms Ruling
1977-24 - Storage Compartments on Vehicles (40 KB)
Alternate magazine construction standards for storage of electric blasting caps with other explosive materials are prescribed.
Explosives Ruling
1980-20 - Rifle Bore Tasers as Firearms (24 KB) A hand-held device with a hand grip bent at an angle to the bore and having a rifled bore which is designed to expel, by means of an explosive, two electrical contacts (barbs) connected by two wires to a high voltage source within the device is classified as a firearm. ATF Rul. 76-6 is amplified. Firearms Ruling
1980-21 - Identification of State of Residency for Out-of-State College Students (23 KB) An out-of-State college student may establish residence in a State by residing and maintaining a home in a college dormitory or in a location off-campus during the school term. Firearms Ruling
1980-8 - Importation of Surplus Military Firearms for Law Enforcement (25 KB) Applications to import surplus military firearms or nonsporting firearms or ammunition for individual law enforcement officers for official use must be accompanied by the agency’s purchase order. Firearms Ruling
1981-3 - Importation of Firearms Acquired Outside the U.S. by U.S. Citizens (30 KB) Nonresident U.S. citizens returning to the United States and nonresident aliens lawfully immigrating to the United States may obtain a permit to import firearms acquired outside of the United States, provided such firearms may be lawfully imported. Firearms Ruling
2003-5 - Distribution of Explosives to Limited Permittees (50 KB)
Distributors distributing explosive materials via common or contract carrier to limited permittees may verify receipt of the materials by telephone, facsimile, e-mail, or other means within three business days of shipment.  ATF Form 5400.4 notation requirements.
Explosives Ruling
1975-31 - Meaning of the Terms "Engaged in the Business" (13 KB)
Explosives manufacturer license required for certain companies that manufacture explosive materials for use in their own operations.
Explosives Ruling
1975-7 - Small Caliber Penguns (51 KB) A small caliber weapon ostensibly designed to expel only tear gas, similar substances, or pyrotechnic signals, which may readily be converted to expel a projectile by means of an explosive, classified as a firearm. Firearms Ruling
1976-15 - Acquisition and Disposition of Pawned Firearms (52 KB) Certain reporting and recordkeeping requirements of pawnbrokers are explained. Firearms Ruling
1976-18 - Alternate Bullet-Resistant Construction Standards for Explosives Magazines (21 KB)
ATF prescribes alternate bullet resistance construction standards for explosives storage facilities.
Explosives Ruling
1976-22 - Qualifying Tax Free Transfers (85 KB) Mere possession of a license and a special tax stamp as a dealer in firearms does not qualify a person to receive firearms transfer-tax-free. Rev. Rul. 58-432 superseded. Firearms Ruling
1982-2 - KG-9 Pistol as NFA Weapon (26 KB) The KG-9 pistol is a machinegun as defined in the National Firearms Act. Firearms Ruling
2005-4 - A Ported Device Attached to the Barrel of a Paintball Gun (14 KB)
Certain integral devices intended to diminish the report of paintball guns are not “firearm silencers” or “firearm mufflers” under the Gun Control Act of 1968 or the National Firearms Act.
Firearms Ruling
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