The Armaspec AR Spare Parts Kit contains common AR parts like springs and detents that are frequently lost or needed replacement. Fits AR 5.56/.223 and AR 7.62/.308 Stainless Steel Made in U.S.A *INCLUDES: 3 SS Takedown / Pivot Pin Detents 3 Takedown / Pivot Pin Detent Spring 1 SS Safety Selector Detent 1 Safety Selector Detent Spring 1 SS Buffer Retainer 1 Buffer Retainer Spring 1 SS Bolt Catch Detent 1 Bolt Catch Detent Spring 1 Magazine Release Spring