Ammunition Storage Components stainless steel 6.5 Grendel magazine is a high quality, exceptionally reliable magazine designed specifically for the popular 6.5 Grendel cartridge. Manufactured entirely in the United States of America using 0.020 gauge 410 Stainless Steel Alloy using cutting edge robotic manufacturing techniques and finished with ASC's proprietary Marlube finish. Marlube is a wear-in coating that burnishes the surface and provides self-lubricating properties for further enhanced reliability.