Global Ordnance AR15 5.56/.223 40 Round Rifle Magazine Black GO-AR15-40-BLK-40RD. Specifications for Global Ordnance AR15 5.56/.223 40 Round Rifle Magazine: Manufacturer: Global Ordnance Fabric/Material: Steel Magazine Capacity: 40 Round Caliber: 5.56x45mm NATO .223 Remington Gun Make: AR Platform Gun Model: AR-15 Quantity: 1 Condition: New Features of Global Ordnance AR15 5.56/.223 40 Round Rifle Magazine Steel Construction Great For Long Term Storage Fully Ribbed Package Contents: Global Ordnance AR15 5.56/.223 40 Round Rifle Magazine What firearm models does the manufacturer say Global Ordnance AR15 5.56/.223 40 Round Rifle Magazine is compatible with? The manufacturer says that Global Ordnance AR15 5.56/.223 40 Round Rifle Magazine is compatible with AR-15Global Ordnance GO-AR15-40-BLK-40RD: AR15 5.56/.223 40 Round Rifle Magazine Black