M. FIREARMS - NATIONAL FIREARMS ACT (NFA)
(M1) The types of firearms that must be registered in the National Firearm
Registration and Transfer Record are defined in the NFA and in 27 CFR Part
179. What are some examples?
Some examples of the types of firearms that must be registered are:
Machineguns;
The frames or receivers of machineguns;
Any combination of parts designed and intended for use in
converting weapons into machineguns;
Any part designed and intended solely and exclusively for
converting a weapon into a machinegun;
Any combination of parts from which a machinegun can be assembled
if the parts are in the possession or under the control of a
person;
Silencers and any part designed and intended for fabricating a
silencer;
Short-barreled rifles;
Short-barreled shotguns;
Destructive devices; and,
"Any other weapons."
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(M25) If a person has a pistol and an attachable shoulder stock, does this
constitute possession of an NFA firearm?
Yes, unless the barrel of the pistol is at least 16 inches in length
(and the overall length of the firearm with stock attached is at least 26
inches). However, certain stocked handguns, such as original semiautomatic
Mauser "Broomhandles" and Lugers, have been removed from the purview of the
NFA as collectors' items.
[27 CFR 179.11]