Aero Precision's M5 is a DPMS-pattern AR-10 receiver set built to tight tolerances in Tacoma, Washington. The M5 upper and lower are sold separately or as complete rifles, forming the base for many custom semi-auto .308 precision builds. Type: Rifle Action: Semi-Auto Caliber: .308 Winchester Capacity: 20 Year introduced: 2016, USA Weight: 128 oz Overall length: 40" Status: Active Intended use: Hunting, Plinking, Competition, Precision Shooting