Shop › CMMG AR15 ROLL PIN FOR BOLT CATCH CMMG AR15 ROLL PIN FOR BOLT CATCH $1.45 CMMG Roll Pin, For AR15 Bolt Catch, 3/32" x 1/2", Black 55CA547 Quantity: Add To Cart Added! CMMG Roll Pin, For AR15 Bolt Catch, 3/32" x 1/2", Black 55CA547