The Browning BAR MK 3 .300 Win Mag is a belgium-made semi-automatic rifle chambered in .300 Winchester Magnum, introduced in 1993. Primary use: Hunting, Big Game. Type: Rifle Action: Semi-Automatic Caliber: .300 Winchester Magnum Capacity: 4 Year introduced: 1993, Belgium Weight: 124 oz Overall length: 44.25" Status: Active Intended use: Hunting, Big Game