This AR-15 MKW-15 magazine is specifically designed for the powerful .458 SOCOM cartridge offering a reliable 10-round capacity. Constructed from durable steel it promises longevity and resilience in rigorous conditions. The sleek black finish adds a touch of sophistication complementing the robust design of the AR-15. Ideal for enthusiasts who demand performance and reliability this magazine is a must-have addition to any AR-15 setup. NOTE: This magazine is a modified 30 round magazine and as such can still hold 30 rounds of 5.56 ammo. The magazine has been modified to function properly with 10 rounds of .458 SOCOM but will physically hold 11 rounds if forced. Due to the many state restrictions on magazine capacity we will not ship these magazines to individuals in the following locations:California Colorado Connecticut Delaware Hawaii Maryland Massachusetts New Jersey New York Vermont Washington (WA) Washington D.C. Aurora Illinois Chicago Illinois Oak Park Illinois