Ruger's AR-556 in 6.5 Grendel with an 18-inch barrel represents the company's recognition of the Grendel's growing hunting acceptance. The rifle features a cold hammer-forged barrel with a 1:8 twist and a free-float M-LOK handguard. Type: Rifle Action: Semi-Automatic Caliber: 6.5 Grendel Capacity: 26 Year introduced: 2019, USA Weight: 68 oz Overall length: 37" Status: Active Intended use: Hunting, Long Range, Multi-Purpose