This kit includes: Safety Selector – Semi Auto, Safety Detent, Safety Detent Spring, Bolt Catch, Bolt Catch Roll Pin 3/32 X .5, Bolt Catch Plunger, Bolt Catch Spring, Mag Catch, Magazine Catch Spring, Steel Mag Release Button, Trigger Guard Assembly, Trigger Guard Roll Pin .132 x .625, Buffer Retainer Pin, Buffer Retainer Spring, Take Down Pin, Takedown/Pivot Detent, Takedown/Pivot Spring, Pivot Pin, Takedown/Pivot Detent, Takedown/Pivot Spring