Ammunition Storage Components LLC or ASC is the premier manufacturer and supplier of AR magazines to the rifle industry. They provide the different capacities of aluminum and stainless steel in .223/5.56 6.8 SPC 6.5 Grendel .308 7.62 x 39 5.45 x 39 and 9mm for the AR15 M-16 and M-4 family of rifle. ASC goes above and beyond current industry standards to ensure the quality of our magazines are second to none.