Milspec or better lower parts kit, without the fire control group or the grip. Comes with Pivot Pin, Takedown Pin, Takedown Pin Springs (x2), QPQ Steel Takedown Pin Detents (x3), Mil-Spec Cast Bolt Catch, Bolt Catch Buffer, Bolt Catch Spring, Mag Catch, Steel Mag Button, Mag Catch Spring, Mil-Spec Cast Safety Selector, QPQ Steel Safety Detent, Selector Spring, Buffer Retainer Pin, Buffer Retainer Spring