Without bayonet lug and cooling sleeve, it was listed in the Winchester catalog as the Model 12 Guard and Riot gun. A 28-ga. sporting version came on the market in 1934.

Initially only chambered in 20 gauge, 12- and 16-ga. versions were introduced in late 1913 and first listed in the 1914 catalog; a 28-ga. version came out in 1934 (a .410-bore model was produced ...