The LaRue OBR 7.62x51mm in 18-inch barrel length provides additional velocity for extended precision shooting while remaining shorter than the full 20-inch target configuration. It uses LaRue's match-grade stainless barrel and is a favored configuration for precision rifle competitors. Type: Semi-Auto Rifle Action: Direct Impingement Caliber: 7.62x51mm Capacity: 20 Year introduced: 2008, USA Weight: 9.7 oz Overall length: 37.5" Status: Active Intended use: Precision, Competition, Range