LWRC M6 Individual Carbine with 16-inch barrel and LWRC's proven short-stroke piston system. Earlier generation piston AR platform. Type: Semi-Auto Rifle Action: Semi-Automatic Caliber: 5.56x45mm Capacity: 30 Year introduced: 2010, USA Weight: 69 oz Overall length: 33.5" Status: Active Military use: Yes Intended use: Military/Duty