The Heckler & Koch 30-Round Steel Magazine is designed for reliable ammunition feeding in M16/M4/AR15-type firearms. This magazine is compatible with any firearm that accepts NATO-standard 5.56 mm magazines.Originally developed for the British L85 (SA80) and L86 weapons, this combat-proven magazine has been utilized by U.S. special operations forces and foreign military units. The magazine features a curved design and is made from select materials, including steel for the housing and follower, with a special anti-friction maritime surface finish for enhanced performance.Key FeaturesCapacity: Holds 30 rounds of 5.56 NATO or .223 Rem ammunition.Combat-Proven Design: Originally developed for military use, ensuring reliability in demanding conditions.Material Construction: Made with durable steel housing and follower for long-lasting performance.Finish: Features a special anti-friction maritime surface finish to enhance functionality.