This new push-button magazine release type lock features a cage that moves up and down covering the magazine release button. This enables you to have a two position type magazine lock that you can depress with your bullet tip for in and out of state use.

In the lowered position you can use the button as the normal magazine release, in the upright position becomes a two-position magazine lock.

The cage moves via a stainless steel 1/4" threaded-screw rated for up to 200lbs of force, so no worrying about breaking it.

This is a great step up from the Prince50 BB if you don't want to spend the extra money for a raddlock!