New HK German 416, MR556 30 Round Maritime Magazine. German factory fresh HK German 416, MR556 magazine. The HK 416, MR556 magazine will also fit all AR15/M16 variants. HK416 AR15 30RD 223 SAND RESISTANT STEEL MAGAZINE Designed to provide optimum ammunition feeding for any M16/M4/AR15-type weapon, the Heckler & Koch 30-Round Steel Magazine can be used in any firearm that uses a NATO-standard 5.56 mm magazine. Originally developed by HK for the British L85 (SA80) & L86 weapons, this curved 30-round magazine has been combat-proven by U.S. special operations forces and foreign military units. The 30-Round Steel Magazine features a well-executed design; select materials, special anti-friction maritime surface finish, advanced spring material, attention to production tolerance, and steel magazine housing and follower. Length: 7.48 inches (190 mm) Width: .94 inches (20 mm) Height: 2.56 inches (165 mm) Weight (empty): .54 lb. (.25 kg) Condition: New Origin: German Brand: Heckler & Koch Magazine Capacity: 30 Caliber: 5.56mm