Bushmaster 450 Stalker in .450 Bushmaster with 20-inch barrel for single-shot deer hunting in states requiring straight-wall cartridges. Type: Rifle Action: Semi-Automatic Caliber: .450 Bushmaster Capacity: 5 Year introduced: 2008, USA Weight: 105.6 oz Overall length: 38.5" Status: Active Intended use: Hunting, Deer