ASC AR-15 Magazine Features Ammunition Storage Components (ASC) builds some of the best magazines available on the market today. ASC magazines are built with the highest quality components to ensure reliable functioning and increased longevity. This is why they have become the approved supplier for many of the most well-known firearms manufacturers in the nation. ASC AR-15 Magazine Specifications Manufacturer: Ammunition Storage Components Manufacturer Part #: 223-10RD-SS Type: Magazine Caliber: .223 Rem/5.56 NATO Capacity: 10 Rounds Color: Black Fit: AR-15