Named for its designer, Captain H. C. Boys, the Boys anti-tank rifle was originally developed in the mid-1930s and was put to use in the early stages of World War II; soon rendered obsolete for its original duty of tank hunting in the European Theater as rapid advancements in tank armor proved effective against the .55 Boys cartridge. That said, the rifle was still put to good service throughout World War II against armored cars, enemy equipment, and snipers in cover too sturdy to punch through with conventional weapons, essentially becoming anti-material rifles decades before the term would be coined. They were used by Finland, who received material support from Allied nations during the Winter War against the Soviet Union, where they were found to be effective against Soviet T-26 tanks, and many saw use by the British in North Africa against the Germans. While this was going on, the Boys rifle also found an audience with the United States Marine Corps. Some of these saw successful use by the U.S. Marines against the Japanese in the Pacific. The tanks and small armored vehicles of the Imperial Japanese Army were less sophisticated when compared with their German counterparts and were ideal prey for the Boys rifle as were any light fortifications they came across. During the Raid on Makin Island, the U.S. Marine Raiders successfully destroyed two Japanese seaplanes carrying reinforcements on the water using a pair of Boys anti-tank rifles from land. Boxed "SA" Finnish Army acceptance mark on the left of the receiver, with "'40" dates on top of the receiver and deactivated barrel. Features the Mk I pattern circular muzzle brake and T-shaped monopod, left-offset blade front and fixed peep rear sight, and top-loading detachable five-round box magazine. The receiver is mounted in a shock-absorbing stock assembly with a rear pistol grip and an alloy buttplate with rubber-covered shoulder pad and a built-in oiler.