Knights Armament 25780 Lower Receiver Assembly Kit 5.56x45mm NATO Black, Black Synthetic Stock & Pistol Grip for SR-15 IWS

The ambidextrous bolt release, selector lever, and magazine release offers left-handed users the ergonomic advantages inherent to AR15-based controls. The drop-in KAC two-stage trigger serves double duty as an aid to precision marksmanship while enabling surgical speed shooting at close range. Features a carbine action spring and a 2H buffer. NOTE: Requires a mag & bolt catch, pivot pin and pins to complete.