AR-556 MPR chambered in .350 Legend with a 16.38-inch barrel, 15-inch free-float M-LOK handguard, and a 5-round magazine compliant with straight-wall cartridge hunting regulations. Targets Midwest deer hunters restricted to straight-wall cartridges. Type: Semi-Auto Rifle Action: Gas-Operated Caliber: .350 Legend Capacity: 5 Year introduced: 2020, USA Weight: 6.8 oz Overall length: 36.5" Status: Active Intended use: Hunting