clandestine
AR-15 Savant
i thought aslong as you did a 77r, you didn't have to register it, regardless of whether you checked the box for voluntary registration, it just needed to be transfered to you via the 77r when you bought it.
Theres a ton of guns that have features that make them "assault rifles" that were purchased on a 4473 alone.
Same applies to home built firearms/receivers (no paperwork)