The KP-15 Optimized Ambi Selector is made to be more easily removed from the KE Arms KP-15 Polymer Lower. Each side has the track notched so it can be placed halfway between safe and fire and pushed out with the selector arms removed. 6061-T6 Billet machined ambidextrous selector, Mil 8625 Type III Class 2 anodized. Reversible for traditional 90 degree arc, or short throw 45 degree arc. Allows operator to manipulate safety from either side of weapon. 17-4 Stainless Steel shaft, black melonite coated. Allen wrench included. Mfg: Ke Arms