Enhanced M5 with Aero's improved ATLAS handguard attachment system. The most popular DPMS-compatible AR-10 upper/lower kit. Type: Rifle Action: Semi-Automatic Caliber: .308 Winchester / 7.62x51mm NATO Capacity: 20 Year introduced: 2016, USA Weight: 192 oz Overall length: 36.5" Status: Active Intended use: Hunting, Precision Shooting, Competition