Shotguns have been made in all sorts of barrel lengths. Mossberg currently offers its new 940 turkey gun in an 18-1/2-inch-barreled version, which is as short-barreled as a full-stock shotgun can ...

Short-barrel firearms are rifles or shotguns with a shorter-than-usual barrel, defined by the federal government as 16 inches or shorter for a rifle and 18 inches or shorter for a shotgun.