Colt LE6940 with 16.1-inch barrel and Diemaco/Colt Canada piston operating system. Monolithic upper receiver integrating rail and gas block. Type: Semi-Auto Rifle Action: Semi-Automatic Caliber: 5.56x45mm Capacity: 30 Year introduced: 2009, USA Weight: 67 oz Overall length: 33" Status: Active Intended use: Law Enforcement/Duty