Ruger American Compact 45 Automatic Colt Pistol ACP Mag Sleeve American. 45 Auto magazines for the full-size Ruger American Pistol for use in the compact Ruger American Pistol. Specifications for Ruger 90640 American Compact 45 Automatic Colt Pistol (ACP) Mag Sleeve American: Manufacturer: Ruger Gun Make: Colt Ruger Gun Model: Ruger American Pistol Caliber: .45 ACP Magazine Capacity: 10 Round Finish: Black Fabric/Material: Polymer Package Contents: Ruger 90640 American Compact 45 Automatic Colt Pistol (ACP) Mag Sleeve American The Ruger 90640 American Compact 45 Automatic Colt Pistol (ACP) Mag Sleeve American is a quality addition to the Ruger lineup. For more great deals on Pistol Magazines by Ruger please browse our Ruger Magazines page. What firearm models does the manufacturer say Ruger 90640 American Compact 45 Automatic Colt Pistol (ACP) Mag Sleeve American is compatible with? The manufacturer says that Ruger 90640 American Compact 45 Automatic Colt Pistol (ACP) Mag Sleeve American is compatible with Ruger American PistolRuger 90640 American Compact 45 Automatic Colt Pistol ACP Mag Sleeve American