JL Billet One Piece Threaded Bolt Catch Pin Black. These pins can be used on the AR15 and the 308 LR bolt catch and ambi switch. Specifications for JL Billet One Piece Threaded Bolt Catch Pin: Manufacturer: JL Billet Gun Model: AR-15 DPMS LR-308 Fabric/Material: Stainless Steel Color: Black Hand: Ambidextrous Country of Origin: USA Gun Type: Rifle Weight: 0.01 lb Features of JL Billet One Piece Threaded Bolt Catch Pin TBD Package Contents: JL Billet One Piece Threaded Bolt Catch Pin What firearm models does the manufacturer say JL Billet One Piece Threaded Bolt Catch Pin is compatible with? The manufacturer suggests that JL Billet One Piece Threaded Bolt Catch Pin is compatible with AR-15 DPMS LR-308JL Billet JLB-BCP: One Piece Threaded Bolt Catch Pin Black