The Aero Precision M5E1 builds on the M5 platform with the enhanced lower receiver featuring an integral trigger guard and flared magwell. The 18-inch barrel delivers excellent long-range ballistics for the .308 cartridge. Ships with the Aero ATLAS R-ONE M-LOK handguard and adjustable gas block, making it one of the most capable factory .308 ARs in its price range. Type: Rifle Action: Semi-Automatic Caliber: 308 Winchester Capacity: 20 Year introduced: 2018, USA Weight: 118 oz Overall length: 38.75" Status: Active Intended use: Hunting, Precision Rifle, Long-Range Shooting, Precision, Duty