High Quality Content by WIKIPEDIA articles! The Model 1200 and Model 1300 were two American pump-action shotguns that were manufactured by the Winchester-Western Division of Olin Corporation. It was produced in 12-, 16- and 20-gauge. The 1200 has the ability to have a bayonet fixed on the end of the barrel to be used in close quarter combat. It is a takedown type shotgun which means it has the capability of being taken apart for easy transportation and storage.