Precision AR-15 platform in 6.5 Grendel, the cartridge developed by Bill Alexander specifically for the AR-15 to extend effective range beyond 5.56x45mm. Type: Rifle Action: Semi-Automatic Caliber: 6.5 Grendel Capacity: 25 Year introduced: 2007, USA Weight: 78 oz Overall length: 38" Status: Active Intended use: Long Range, Hunting