Brand: Ruger Model: Mark IV 22/45 Caliber: .22 LR  Capacity: 10 Barrel Length: 4.40\" OAL: 8.50\" Action: Semi Automatic Receiver Material: Alloy Steel Barrel Description: Hammer Forged Bull Barrel Finish: Black Muzzle: Threaded 1/2\"-28 Twist: 1:16 Sights: Adjustable Safety: Ambidextrous Thumb Trigger: Curved Weight: 33.3 oz Included: 2 Mags