Patriot Ordnance Factory Selector Switch, Ambidextrous, Black 00666 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.