Possibly serialized receivers, which is probably the majority of builds, but they can't track 80%s that's why they want to ban them. And there are quite a few out there. They also can't track parts kits, which can be finished by 80% or 3D printing nowadays. They can't track my FAMAR its just a 16" AR upper in a 3D printed shell. The numbers are probably ~20% higher I would guess as a rough estimate.
Possibly serialized receivers, which is probably the majority of builds, but they can't track 80%s that's why they want to ban them. And there are quite a few out there. They also can't track parts kits, which can be finished by 80% or 3D printing nowadays. They can't track my FAMAR its just a 16" AR upper in a 3D printed shell. The numbers are probably ~20% higher I would guess as a rough estimate.