The most commonly used parts to complete a custom AR-15 rifle and the same parts Wilson Combat uses in their shop on their custom AR-15 rifles. These quality parts are built by USGI contractors to meet or exceed Military Specifications. This kit includes a right-hand safety selector. NOTE- There are no fire control parts (Hammer, Trigger, Disconnector, Springs) included in this kit. Parts Included: Bolt Catch Bolt Catch Plunger Bolt Catch Roll Pin Bolt Catch Spring Magazine Catch Magazine Catch Spring Magazine Catch Button Pivot Pin Takedown pin 2x Pivot/Takedown detents 2x Pivot/Takedown detent springs Mfg: Wilson Combat