Battle Arms California Magazine Block Kit AR-15

The Battle Arms California Magazine Block Kit blocks the magazine release until the rear pin is removed and the upper receiver is lifted upward and away from the lower receiver when installed properly in your firearm. To ensure proper operation, a qualified gunsmith is recommended for installation. Modification of your firearm is required. Please be advised this does not come with a jig for installation. Includes: Stainless Steel PinLocking Set ScrewSpring