This Safety Selector is compatible with all known AR variant lower receivers - if your gun is compatible with a “Mil-Spec†AR-15 semi-auto safety, it will work with this option from Battle Arms. The safety on your rifle should always be engaged until the moment you are ready to discharge a round, but this can be difficult when your safety isn’t within a finger’s reach. This Ambi Safety Selector from Battle Arms comes with a regular and short-throw option, enabling you to tailor your safety to your preferences. These levers are fully-modular and can be swapped to each side of your rifle.