27 CFR Part 447
Importation of Arms, Ammunition and Implements of War
27 CFR Part 478
Commerce in Firearms and Ammunition
27 CFR Part 479
Machine Guns, Destructive Devices, and Certain Other Firearms
27 CFR Part 555
Commerce in Explosives
27 CFR Part 646
Contraband Cigarettes
27 CFR Part 771
Rules of Practice in Explosive License and Permit Proceedings
Complete muffler or silencer device. A firearm muffler or firearm silencer that contains all component parts necessary to function, whether or not assembled or operable.
Complete muffler or silencer device. A muffler or silencer that contains all component parts necessary to function, whether or not assembled or operable.
(b) Firearm muffler or silencer frame or receiver. The terms "frame" and "receiver" shall mean, in the case of a firearm muffler or firearm silencer, the part of the firearm, such as an outer tube or modular piece, that provides housing or a structure for the primary internal component designed to reduce the sound of a projectile ( i.e., baffles, baffling material, expansion chamber, or equivalent). In the c..
(iii) Multi-piece frame or receiver. In the case of a multi-piece frame or receiver, the modular subpart that is the outermost housing or structure designed to house, hold, or contain either the primary energized component of a handgun, breech blocking or sealing component of a projectile weapon other than a handgun, or internal sound reduction component of a firearm muffler or firearm silencer, as the case may be, shall be the subpart of the multi-pi..
(3) Multi-piece frame or receiver. In the case of a multi-piece frame or receiver, the modular subpart that is the outermost housing or structure designed to house, hold, or contain either the primary energized component of a handgun, breech blocking or sealing component of a projectile weapon other than a handgun, or internal sound reduction component of a firearm muffler or firearm silencer, as the case may be, shall be the subpart of a multi-piece ..