The Battle Arms Pro Ambidextrous Safety Selector is the perfect upgrade to your AR-15. It comes standard with a reversible throw safety center with 0Adeg-90Adeg and 0Adeg-60Adeg short-throw options. The standard and short safety levers are fully interchangeable and modular to accommodate left or right-handed shooters. The BAD-ASS-PRO is now 100% compatible with all known(3), AR variant lower receivers, and triggers designed to work with the "Mil-Spec" AR-15 semi-auto safeties. No longer do you need a short-throw relief cut on your lower receiver to use the ambidextrous safety, simply use the provided short-throw markings sticker! No longer do you have to choose which trigger is compatible with the safety! If the trigger will work with a "Mil-Spec" AR-15 semi-auto safety, it will work with the BAD-ASS-PRO! No more broken screws! Don't settle for wiggling levers! No more stripped screw heads! The patent-pending dovetail design and internal locking me...