LUTH GUNSMITH PARTS KITLuth AR, Gunsmith Kit, For AR 15, Includes Buffer Retainer (10), Buffer Retainer Spring (10), Bolt Catch Spring (5), Bolt Catch Buffer (5), Bolt Catch Roll Pin (5), Detent Spring (20), Takedown Detent (20), Front Pivot Pin (5), Disconnector (5), Trigger Spring (5), Pistol Grip Screw (3), Pistol Grip Screw Washer (3), Selector Ejector Spring (10), Selector Detent (10), Hammer Trigger Pin (10), Rear Takedown Pin (5), Disconnector Spring (5), Hammer