80% receiver combination set includes 1ea AR-15 80% complete lower receiver, 1ea AR-10 80% complete DPMS Style Lower receiver, 2 side plates for the AR-15 80% receiver, 2 side plates for the AR-10 80% receiver, 1ea master plate that fits both side plates, 3ea guide plates and screws to hold the master and guide plates. Side plates are designed to hold the 80% receiver and guide the drilling of the hammer, trigger pin holes, and the selector hole. They are held to the receiver by the front pivot pin, rear take down pin holes and held on top by the master plate. The 3 guide plates are made to fit within the master plate to guide the removal of the metal from the internal parts pocket. Jig Sets will now have the selector hole incorporated into the plate with guide.