Sig Sauer M400 TREAD in 6.5 Grendel with 16-inch barrel, Sig's value-tier AR-15 applied to the intermediate long-range cartridge. Type: Rifle Action: Semi-Automatic Caliber: 6.5 Grendel Capacity: 26 Year introduced: 2019, Germany Weight: 96 oz Overall length: 32" Status: Active Intended use: Hunting, Sporting, Long Range