The Walther Colt M4 Ops is a licensed Colt-branded .22 LR AR-pattern rifle with a 16.2-inch barrel, built by Walther Arms to precise M4 specifications including a functional six-position collapsible stock. Type: Rifle Action: Semi-Auto Caliber: .22 LR Capacity: 30 Year introduced: 2013, Germany Weight: 5.8 oz Overall length: 32.75" Status: Active Intended use: Training/Plinking