Product Description Phase 5 Weapon Systems PMR, Magazine Release, Black Anodized Finish, CNC Machined from 6061-T6 Billet Aluminum, Fits AR-15 and AR-10 Receivers PMR-BLK Phase 5 Weapon Systems PMR, Magazine Release, Black Anodized Finish, CNC Machined from 6061-T6 Billet Aluminum, Fits AR-15 and AR-10 Receivers PMR-BLK at Hinterland Outfitters $9.60 Buy Now Check Price on Amazon Check Price on eBay