Calico by American Industries. This is a super neat platform, the M100's design, especially the top-mounted magazine, gives it a futuristic, almost science fiction-like aesthetic, which has made it popular in movies and games. The Calico M100 is a semi-automatic known for its unique, high-capacity helical magazine. It's a blowback-operated firearm, meaning it utilizes the recoil of the firing round to cycle the action. The M100's distinctive feature is its high-capacity magazine, which feeds from a helical (spiral) path, allowing it to hold a significant number of rounds. This magazine is located on top of the weapon. This particular pistol is in very good condition and will make a great plinker or collector's piece! CALIBER: .22 caliber long rifle CAPACITY: 100 round Helical Feed fully interchangeable on all firearms ACTION: delayed blowback RATE: semi-automatic MUZZLE VELOCITY: 1,240 FPS BARREL: 6 heat treated Chrome Molly RIFLING: 1 twist in 16 WEIGHT: Empty - 2.2 lbs, Loaded w/100rd mag - 3.75 lbs LENGTH: 17.9 RECEIVER: prime-cast A-356 aluminum, T-6 temper FURNITURE: glass-filled polymer for better impact resistance SIGHTS: notched rear, adjustable for windage SAFETY: trigger and hammer lock