The POF-USA ambidextrous safety selector is a drop in upgrade designed to increase the shooters' options and maximize the efficiency of taking the rifle from "Fire" to "Safe". Installation of this product is nearly identical to installing a standard selector, the only difference is once the selector is installed you will need to attach the right side lever using a 1/16 Allen wrench. Ambidextrous Operation For the best selection of Modern Sporting Rifle parts and accessories, shop Palmetto State Armory!