The Heckler & Koch MR556 .223 Remington/5.56 NATO 30-Round Replacement Magazine features steel construction and a 30-round capacity. Compatible with MR556 AR15, M4 and M16 .223 Remington/5.56 NATO caliber rifles. Detachable design. HK Heckler & Koch MR556 .223 Remington/5.56 NATO 30-Round Replacement Magazine - Shooting Supplies And Accessories at Academy Sports
