Wilson Combat Small Parts Kit, Fits Wilson Combat AR10 Billet Receiver, Black, Includes - Wilson Combat Bullet Proof Bolt Release WC-10, Bolt Catch Screw for WC-10 Billet Lower, Bolt Catch Plunger, Bolt Catch Roll Pin, Bolt Catch Spring, Magazine Catch, Magazine Catch Spring, Magazine Catch Button, WC-10 Pivot Pin, WC-10 Takedown pin, 2x Pivot/Takedown detents, 2x Pivot/Takedown detent springs, Safety Detent, Safety Detent Spring, Semi-auto Safety selector (Right Hand) and 2x Trigger/Hammer Pins TR-LOWERK-10 The parts to complete a custom WC-10 rifle lower receiver and the same parts they use in their shop for their custom WC-10 style rifles. This kit includes a right hand safety selector. As WC-10 style lowers have an integral trigger guard" no trigger guard or pin included. There are no fire control parts (Hammer" Trigger" Disconnector" Springs) included in this kit. Note-these parts are intended for use in a Wilson Combat WC-10 lower receiver only.