The Magnum Research BFR (Biggest Finest Revolver) is a stainless steel single-action revolver built on an oversized Ruger-inspired frame for high-power hunting cartridges. The 5.5-inch 45-70 variant is the most compact configuration — massive power in a packable sidearm. Type: Revolver Action: Single-Action Caliber: 45-70 Govt Capacity: 5 Year introduced: 1999, USA Weight: 57 oz Overall length: 11.5" Status: Active Intended use: Hunting