Named for its designer, Captain Boys, the Boys Rifle was developed in the mid-1930s and was soon rendered obsolete for its original duty of tank hunting in the European Theater as developments in German armor left the proprietary 55 Boys cartridge behind. That said, the rifle was still put to good service through World War II, most famously by the Finns against the Soviets, as well as by the U.S. Marine Corps against the Japanese in the Pacific Theater, becoming one of the grandfathers of the modern "anti-material rifle" concept. Refitted with a 50 BMG chambered barrel in compliance with the National Firearms act, this Boys is equipped with a tubular steel muzzle brake, a hooded blade front sight, and a new fully adjustable Williams peep sight in lieu of the original 2-position peep, as well as a 4 5/8 inch segment of mounting rail (unknown style) fitted to the left side of the magazine well. Assorted British proofs are present, in addition to the model marking on the left side of the frame, with a turned bolt and a canted pistol grip. The barreled receiver is installed in a shock-absorbing rail frame stock, with an early pattern "T" bar bipod, a rear pistol grip with metal knuckle guard, hardwood cheekpiece, and a metal buttplate with integral oiler and a thick leatherette pad.

Fine as professionally rebarreled/refinished/refurbished, with some light handling marks overall and a few patches of spotting on and around the magazine. The stock is in equal condition. Mechanically excellent.