Tactical Superiority AR-10 Lower Parts Kit A2 Black Grip, .308 - Tactical Superiority's .308 lower parts kit includes all of the parts needed to assemble a stripped .308 lower receiver. Includes: .308 Takedown Pin, .308 Pivot Pin, Takedown Pin Detent (2), Takedown Pin Detent Spring (2), .308 Bolt Catch, Bolt Catch Plunger, .308 Bolt Catch Screw, Bolt Catch Spring, Buffer Retainer, Buffer Retainer Spring, Hammer & Trigger Pin (2), Hammer Spring, Trigger Spring, Disconnector, Disconnector Spring, Magazine Catch, Magazine Catch Spring, Magazine Catch Button, Trigger Guard Assembly, Trigger Guard Pivot Spring Pin, Safety Selector, Safety Selector Detent, Safety Selector Detent Spring, Pistol Grip Screw, Pistol Grip Screw Lock Washer, Hammer, Trigger, Pistol Grip (Black). Note: This kit will not fit Armalite, DPMS GII, LMT, LWRC or POF lower receivers.