The Geissele Posi-Snap Ambidextrous safety is made from 400 series stainless steel, and features Geissele’s Posi-Snap design that offers a very positive and tactile feel as the safety snaps into position when engaged by the operator. The Geissele Posi-Snap Ambidextrous safety greatly improves longevity and performance over its mil-spec counterpart. Geissele Automatics Geissele Ambi Posi-Snap Safety Selector 05-887