The Windham HBC (Heavy Barrel Carbine) features a government-profile heavy barrel, a free-float aluminum handguard, and a match-grade two-stage trigger. Positions between the SRC and competition rifles as a precision-capable daily-use carbine. Type: Semi-Auto Rifle Action: Gas-Operated Caliber: 5.56x45mm Capacity: 30 Year introduced: 2013, USA Weight: 7.3 oz Overall length: 32.6" Status: Active Intended use: Precision, Range, Patrol