Heckler & Koch USC .45 Cal Rifle Magazine 10 Round Black 10. Compatible with all HK USC Carbines. Specifications for Heckler & Koch USC .45 Cal 10 Round Rifle Magazine: Manufacturer: Heckler & Koch Color: Black Finish: Matte Fabric/Material: Polymer Magazine Capacity: 10 Round Caliber: .45 ACP Gun Make: Heckler & Koch Gun Model: Heckler & Koch HK45 Gun Type: Pistol Quantity: 1 Package Contents: Heckler & Koch USC .45 Cal 10 Round Rifle Magazine What firearm models does the manufacturer say Heckler & Koch USC .45 Cal 10 Round Rifle Magazine is compatible with? The manufacturer says that Heckler & Koch USC .45 Cal 10 Round Rifle Magazine is compatible with Heckler & Koch HK45Heckler & Koch 219486S: USC .45 Cal Rifle Magazine 10 Round Black 10