Cannon Breech was a trade name used by the Hopkins and Allen Company on single-shot, break action shotguns made between 1908 and 1915. The shotguns featured a 3/8-inch reinforced steel breech.
Samuel Hopkins and Charles Allen purchased the assets of the Bacon Manufacturing Company and formed the Hopkins and Allen Company. Bacon's business had suffered due to declining government arms purchases after the Civil War. Hopkins and Allen manufactured a variety of rifles, revolvers and shotguns until 1915 when commercial production ended and the company began manufacturing Mauser Model 1898 rifles for the Belgium government. The company went bankrupt in 1917, and Marlin Firearms and the U.S. Army took over the factory to manufacture Browning automatic rifles.