Bergara has quickly become one of the most respected barrel makers in the world. Manufactured in Bergara Spain and being used by numerous top-tier gun manufacturers in both Europe and the United States we have combined the most technically advanced barrel manufacturing techniques state-of-the-art machinery and an unwavering commitment to quality to become a company synonymous with accuracy. And now with our barrels we are building several lines of high-quality tactical and hunting rifles. Specifications: Caliber: 450 Bushmaster Weight: 7.4lbs. Overall Length: 39.5" Barrel Length: 20" Barrel Taper: No. 5 Muzzle: 11/16 x 24 Finish: Matte Blued Magazine: Hinged floor plate Magazine Capacity: 4 standard Stock: American-style synthetic with SoftTouch finish Scope Mount: Fits Remington 700 bases with 6-48 screws Bottom Metal: Standard with Floor plate. Convertible to detachable magazine