Ammunition Storage Components AR-15 .223 Remington 20 Round Rifle Magazine Gray 20RD. 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. Specifications for Ammunition Storage Components AR-15 .223 Remington 20 Round Rifle Magazine: Manufacturer: Ammunition Storage Components Magazine Capacity: 20 Round Caliber: .223 Remington Gun Model: AR-15 Heat Treated for Strength and Durability Package Contents: Ammunition Storage Components AR-15 .223 Remington 20 Round Rifle Magazine What firearm models does the manufacturer say Ammunition Storage Components AR-15 .223 Remington 20 Round Rifle Magazine is compatible with? The manufacturer suggests that Ammunition Storage Components AR-15 .223 Remington 20 Round Rifle Magazine is compatible with AR-15Ammunition Storage Components 20-223-AL-GM-O-ASC-20RD: AR-15 .223 Remington 20 Round Rifle Magazine Gray