CMMG AR-15 .22 LR BOLT HOLD OPEN SPRING/FOLLOWER

Locks Bolt Open After Last Round; Preserves Bolt Catch Button Function

Drop-in parts for rifles fitted with a CMMG or Atchisson-style .22 LR conversion kit work with the existing bolt catch to lock the bolt to the rear after the last round is fired. Follower/Spring Set upgrades a 25-round CMMG magazine with a follower that activates the Bolt Hold Open Actuator when the last round is fired. Includes an extra-power spring to ensure reliable feeding. Works only with the Bolt Hold Open Actuator installed. Each 25-rd magazine requires one Spring/Follower Set.