Watch Chief Instructor The Rogue Banshee turn an 80% mup-1 from jsd supply into a Sig P320 Fire Control Unit. In this video, he walks you through each step from seating the mup-1 into the jig, bending and cutting the rails, drilling the holes, and opening the trigger slot. Enjoy this classic build video by TRB!
Members Only - Sig P320 MUP-1 Build
$0.00Price
