Magnum Research semi-auto .22 rifle with a 18-inch barrel using a Bull-Barrel profile and a polymer stock with thumb-hole design. Built on a 10/22-compatible platform with aftermarket trigger upgrades. Type: Rifle Action: Semi-Automatic Caliber: .22 LR Capacity: 10 Year introduced: 2005, USA Weight: 5.5 oz Overall length: 36.5" Status: Active Intended use: Target,Plinking,Competition