922(r) is a list of "naughty or evile" foreign made parts. If the part is on the list it counts, if it isn't it doesn't.
You can substitute "non-Evile" (U.S. made) parts for the foreign (evile) ones to get the "parts count" down to the correct quantity for your design.
Unfortunately the "listed" parts are generic & the count varies from gun to gun.
As an example this is the list for the FAL, the only one I'm familiar with to quote.
Quote:
As per 922r the following parts on the FAL qualify:
receiver (upper receiver)
barrel
muzzle attachment
bolt
bolt carrier
operating rod (cocking handle)
gas piston
trigger housing (lower receiver)
trigger
hammer
sear
buttstock
pistol grip
handguard
magazine body
magazine follower
magazine floorplate
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If you're "building" an SBR then you have to comply with the parts count for that rifle as 922(r) applies to the builder, not the owner if they are different.
__________________
Allan Quatermain: “Automatic rifles. Who in God's name has automatic rifles”?
Elderly Hunter: “That's dashed unsporting. Probably Belgium.”
