2. For Class 2 manufacturers to 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.

Under Federal law, anyone may purchase these legally, but you must have a Class 2 license to legally use them. Additionally, your state and local laws may prohibit purchase or possession, so check before you buy, as with everything we sell. Detailed instructions accompany each fixture.