Duramag Rifle Magazine AR-15 .400 Legend 10-Round Stainless Steel w/ Orange AGF Follower Black 10RD. 400 Legend Chambered AR-15. Specifications for Duramag AR-15 .400 Legend 10-Round Rifle Magazine: Manufacturer: Duramag Color: Black Finish: Matte Fabric/Material: Stainless Steel Magazine Capacity: 10 Round Caliber: .400 legend Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Quantity: 1 Package Contents: Duramag AR-15 .400 Legend 10-Round Rifle Magazine What firearm models does the manufacturer say Duramag AR-15 .400 Legend 10-Round Rifle Magazine is compatible with? The manufacturer suggests that Duramag AR-15 .400 Legend 10-Round Rifle Magazine is compatible with AR-15Duramag 1040041172CPD-10RD: Rifle Magazine AR-15 .400 Legend 10-Round Stainless Steel w/ Orange AGF Follower Black