The LE6720 is Colt's law enforcement AR-15 with a lightweight profile barrel to reduce weight versus the M4-contour LE6920. The thinner profile costs some heat resistance during sustained fire but reduces carry weight on officers wearing the rifle for long periods. Type: Semi-Auto Rifle Action: Gas-Operated Caliber: 5.56x45mm Capacity: 30 Year introduced: 2009, USA Weight: 6.4 oz Overall length: 32.5" Status: Active Intended use: Patrol, Tactical