Big Frame Revolver with Bisley Grips Features Magnum Research's Biggest Finest Revolver is truly the biggest finest revolver on the market today. Entirely manufactured in the US and like the legendary Desert Eagle pistol it is designed as a magnum from the ground up. The BFR is all stainless and has a precision grade barrel that delivers unmatched accuracy with lead or jacketed bullets. The BFR is the most powerful production single action gun made and with 10 calibers and two frame sizes to choose from you can take everything from grouse to grizzly. Big Frame Revolver with Bisley Grips Specifications Caliber: .500 S&W Magnum Barrel: 10" Twist Rate: 15 Groove Diameter: 0.500 OA Length: 17.5" Weight: 4.7 lbs Height: 6" Slide Width: 1.75" Trigger Pull: 3~4 lbs Finish: Brushed Stainless Steel Construction Sights: Factory Black Fixed Front / Rear Adjustable Shots: 5 Grips: Bisley