NEW DESIGN THAT COMPLIES WITH ALL NEW AND UPCOMING CALIFORNIA LAWS BY FORCING THE ACTION TO BE OPENED FOR USE!!

This California Compliant Magazine Lock for our ML-9 and ML-45 lower receivers converts the detachable magazine system to require the user to slightly pivot the upper receiver open to release the magazine. The magazine lock can be used on the Spartan ML-9 and ML-45 Lower Receivers after removing the stock magazine catch.

NOTE:The MK 2 .45 lock will work with all uppers EXCEPT the Spartan pistol caliber side charging upper (please use the California Compliant Mag Lock MK1 (ML-9) model for ML-45 lowers matched with our Spartan Pistol Caliber-Side Charging upper).

This lock is manufactured from billet aluminum and features a black hard anodized finish. You can reuse the stock magazine catch spring and magazine catch threaded pin.

Simple install — Use your existing mag catch spring and threaded pin to install this catch.