Product DescriptionThe HK MR556 30-round steel magazine is designed to deliver reliable, consistent feeding in NATO-standard 5.56 mm platforms. Originally developed by Heckler & Koch for the British L85 (SA80) and L86 weapons, this combat-proven curved magazine is built with a steel housing and follower, advanced spring materials, and tight production tolerances for dependable performance. A special anti-friction maritime surface finish helps promote smooth operation in demanding conditions, making it an excellent choice for AR-15/M16/M4-style rifles and HK MR556-pattern firearms.Product Highlights Combat-proven 30-round curved steel magazine originally developed for the L85 (SA80) and L86 platforms NATO-standard 5.56x45mm compatibility for broad use in AR-15/M16/M4-type firearms Steel magazine housing and follower for durability and long service life Special anti-friction maritime surface finish to support smooth feeding and corrosion resistance Precision-focused design with advanced spring material and attention to production tolerances for reliable cyclingSpecs Brand: HK (Heckler & Koch) Manufacturer Part Number: 251770S UPC: 642230248311 Caliber: 5.56x45mm NATO Capacity: 30 rounds Magazine Type: Detachable Material: Steel Color/Finish: Black Compatibility: NATO-standard 5.56mm magazine wells (commonly AR-15/M16/M4-type); HK MR556/MR556A1Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product's manufacturer.