Shop › DURAMAG 20RD 5.56 ALUM MAG GY/BLK DURAMAG 20RD 5.56 ALUM MAG GY/BLK $17.70 DURAMAG Magazine, 223 Remington/556NATO/300 Blackout, 20 Rounds, Fits AR-15, Black AGF Follower, Aluminum, Gray 2023002175CPD Quantity: Add To Cart Added! DURAMAG Magazine, 223 Remington/556NATO/300 Blackout, 20 Rounds, Fits AR-15, Black AGF Follower, Aluminum, Gray 2023002175CPD