Firearm.

Firearm. Any weapon (including a starter gun) that will or is designed to or may readily be converted to expel a projectile by the action of an explosive; the frame or receiver of any such weapon; any firearm muffler or firearm silencer; or any destructive device. The term does not include an antique firearm.

Source

32 CFR § 273.3

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Scoping language

Unless otherwise noted, these terms and their definitions are for the purpose of this subpart.

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