Battle Arms California Magazine Release Blocking Pin Parts Kit

Battle Arms California Magazine Release Blocking Pin Parts KitCalifornia Magazine Release Blocking Pin Parts KitIncludes Stainless Steel Pin, Locking Set Screw, and Spring. Please be advised that this does not include a jig for installation. Modification of your firearm is required. To ensure proper operation, a qualified gunsmith is recommended for installation.When installed properly in your firearm, the pin blocks the magazine release until the rear pin is removed and the upper receiver is lifted upward and away from the lower receiver.Modification of your firearm is required. A qualified gunsmith is strongly recommended for proper installation to ensure safe and reliable operation.