NBS Upper Tension Screw With Nylon Tip 1/4"-28 Thread

This Nylon Tipped Tension Set Screw allows users to remove "slop" and fine tune the fit of their upper with their lower receiver. Achieve a tight fit with any standard AR-15 upper receiver by inserting the screw into the grip tang of any Lower Receiver that comes equipped with a vertical 1/4" - 28 threaded hole and tightening against the upper receiver until there is no wobble between the 2 parts. Alloy Steel, Nylon-tip Set Screw 1/4"-28 Thread, 1/2" Long