The Elftmann Tactical AR-15 Ambi Speed Safety ensures that you can quickly and easily move your AR-15 from "Safe" to "Fire" and back again with one easy, simple movement. The selector requires zero movement of the shooter's dominant hand to actuate and is machined from hardened stainless steel. The safety ships with the required detent and fits all standard mil-spec AR-15 receivers. Available finish options are black oxide or polished stainless steel. The ambidextrous selector does not work with Hiperfire triggers. Mfg: Elftmann