For Class 2 manufacturers to easily and accurately place the holes for factory select-fire components into a previously semi-automatic-only weapon. They guide the drill and provide precise hole placement so a valuable receiver is not destroyed. They’re built correctly and can be used for a one-off, used in a production environment, or anything in between.

Warning: Illegal manufacture of a machine gun is a felony good for ten years in prison.

**ALL NFA RULES APPLY**