Magazine MkW-15 for .458 SOCOM with 10 round capacity. Features a polymer body and hardened steel feed lips, laser engraved 458 SOCOM, and a stainless steel spring. Top of magazine catch is steel, with a non-tilt follower and constant-curve internal geometry. Slim body design and slide-on bottom for easy disassembly. Designed, tooled, manufactured, and assembled in the USA. Note: This magazine is modified from a 30rd 5.56 magazine and can hold 10 rounds of .458 SOCOM; it may physically hold 11 rounds if forced. Not shipped to states with magazine capacity restrictions.