Ammunition Storage Components AR-15/M-16 20 Round Rifle Magazine 9mm Luger Orange Follower Black Stainless Steel 20. 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 their magazines are second to none. Specifications for Ammunition Storage Components AR-15/M-16 20 Round Rifle Magazine: Manufacturer: Ammunition Storage Components Magazine Body Material: Steel Fabric/Material: Stainless Steel Magazine Capacity: 20 Round Gun Make: AR Platform Gun Model: AR-15 Features of Ammunition Storage Components AR 308 Win SR25 20 Round Rifle Magazine: 300 Series SS Floor plate with Black Oxide Coating for Corrosion Resistance Chrome Silicon Springs Enhanced Anti-tilt Polymer Followers with PTFE Heat treated Package Contents: Ammunition Storage Components AR-15/M-16 20 Round Rifle Magazine What firearm models does the manufacturer say Ammunition Storage Components AR-15/M-16 20 Round Rifle Magazine is compatible with? The manufacturer says that Ammunition Storage Components AR-15/M-16 20 Round Rifle Magazine is compatible with AR-15Ammunition Storage Components 20-9MM-AR-SS-BM-O-ASC: AR-15/M-16 20 Round Rifle Magazine 9mm Luger Orange Follower Black Stainless Steel 20