Duramag SS AR-15 Rifle Magazine .223 Rem/.300 Blackout/5.56x45mm NATO 30 Round Black w/ Black Follower Detachable 1 Pack Stainless Steel. It is constructed from premium 410 Stainless Steel for maximum durability. This material coupled with advanced interior and exterior geometries ensure ultimate reliability and feeding. This magazine utilizes DURAMAG T-360 coating to ensure not only incredibly smooth performance and ease of loading but also product longevity through the harshest conditions. Specifications for Duramag SS AR-15 .223 Rem 30 Round Rifle Magazine: Manufacturer: Duramag Fabric/Material: Stainless Steel Magazine Capacity: 30 Round Caliber: .223 Remington Gun Make: AR Platform Gun Model: AR-15 Quantity: 1 Condition: New Package Contents: Duramag SS AR-15 .223 Rem 30 Round Rifle Magazine What firearm models does the manufacturer say Duramag SS AR-15 .223 Rem 30 Round Rifle Magazine is compatible with? The manufacturer says that Duramag SS AR-15 .223 Rem 30 Round Rifle Magazine is compatible with AR-15Duramag 3023041175CPD-30RD: SS AR-15 Rifle Magazine .223 Rem/.300 Blackout/5.56x45mm NATO 30 Round Black w/ Black Follower Detachable 1 Pack Stainless Steel