American Tactical Imports Mp5 Magazines. Giving you a side view window the American Tactical Imports (ATI) High Capacity Magazine allows you to analyze your ammunition needs. Specifications for American Tactical Imports Mp5 Magazines: Manufacturer: American Tactical Imports Caliber: .22 Long Rifle Magazine Capacity: 10 Round Additional Features: No Length: 6 cm Weight: 0.4 oz Height: 1 in Width: 1.5 in Package Contents: American Tactical Imports Mp5 Magazines