Proudly manufactured in the U.S.A, the Phase 5 90-degree ambidextrous safety selector is compatible with AR-15 and AR-10 / LR-308 weapons. It is interchangeable and can be configured for right or left-handed shooters. The safety selector is designed with wide levers for ease of use and is constructed with an lightweight 6061-T6 billet aluminum lever and a CNC machined carbon steel core that has been heat treated.