Patriot Ordnance Factory Ambidextrous Selector Switch - 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 attached the right side lever using a 1/16 allen. Ambidextrous