The Heckler & Koch 416 magazine is a 20-round magazine designed for the 5.56mm caliber, specifically compatible with the H&K 416 and MR556 rifles. This magazine is constructed from durable black steel, ensuring longevity and reliable performance.Key FeaturesCaliber Compatibility: Designed for .223 Rem/5.56 NATO ammunition.Capacity: Holds up to 20 rounds of ammunition.Included Quantity: Sold as a single magazine.