Rock River Arms LAR-15 Predator HP with 20-inch stainless Hogue-profiled barrel and varmint stock. Precision hunting configuration. Type: Rifle Action: Semi-automatic Caliber: 5.56x45mm Capacity: 20 Year introduced: 2007, USA Weight: 82 oz Overall length: 39.5" Status: Active Intended use: Varmint Hunting/Precision