Product Description Fits AR 5.56/.223 and 7.62/.308 receivers; CNC machined 6061-T6 billet aluminum; Easy to install; Including a dimpled design; Anodized finish PHASE 5 WEAPON SYSTEMS Phase 5 Dimpled Button Black Anodize Magazine Release (PMR-BLK-Dimpled) at GritrSports $10.93 Buy Now Check Price on Amazon Check Price on eBay