Action: Semi-Auto - Caliber: .22 LR - Capacity: 28rd - Barrel: 6 (1:16) with Muzzle Brake - Sights: Adjustable Rear Sight Post Front Sight - Upper Receiver: Polymer Black - Lower Receiver: Polymer Black - Grip: Polymer Black - Handguard: Quadrail Black - Length: 14.17 - Weight: 3.97 lbs. - The mfour-22 Pistol is a 6 barrel version of the mfour-22 ri?e: having the same general characteristics of the full size version the mfour-22 Pistol includes features like: Quad Rail capable pistol forend; rear back plate with a picatinny rail; plastic hard-shell case carry handle with front and rear sight. A cleaning kit and two magazines are included in the box. GEN II: The second generation of model Mfour-22 features a reinforced polymer with mechanical characteristics very similar to aluminum.