DealMWG IK-520 40 Round STEEL Reinforced Polymer AR-15 Magazine - 5.56x45. The next-generation 40 Round magazine is here. A 40-round 5.56x45 NATO (.223 Remington) Steel Reinforced Polymer Magazine for AR15/M16 compatible weapons. from MWG Company (Product 012-IK-40SR) |