The CMMG Bolt Hold Open Acuator allows for full function of your rifle's existing bolt catch. The CMMG actuator is compatible with any .22 LR Atchisson-style conversion kit, dedicated or drop-in. It optimizes magazine fit and removes play between the upper and lower. In order to function, the actuator must be used in conjuction with magazines that have been upgraded with CMMG's Bolt Hold Open followers and springs. Minor fitting of the actuator may be required before use.
Must be used in conjunction with CMMG Bolt Hold Open Follower and Spring (product # 264-289)
Fitting to your individual lower may be required for optimal performance.
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