The Phase 5(TM) PMR-Dimpled is a CNC machined 6061-T6 billet aluminum magazine release button. Easy to install, the PMR is a drop in component that replaces the Mil-Spec magazine release button.Including a dimpled design on the button face, the PMR adds style and keeps the function of a Mil-Spec button.Fits AR 5.56/.223 and 7.62/.308 receivers.FINISH: Finish-Black: Black Anodize Finish-Red: Red Anodize Finish-Blue: Blue Anodize Finish-Grey: Grey Anodize Finish-FDE: MagPul Flat Dark Earth Cerakote (code C-267) Finish-ODGreen: Mil Spec OD Green (code H-240)