BAR featuring Browning's BOSS (Ballistic Optimizing Shooting System) — a muzzle device that allows the shooter to tune barrel vibration frequency to specific ammunition, theoretically achieving maximum accuracy with each load. The BOSS combines a compensator and adjustable tuning rod in a single unit. Type: Rifle Action: Semi-Automatic Caliber: .300 Win Mag Capacity: 3 Year introduced: 1994, Belgium Weight: 8.2 oz Overall length: 46.5" Status: Discontinued Intended use: Hunting, Long-Range, Competition