The M1912’s trench gun variant had its barrel trimmed to 20 inches overall and was fitted with a perforated steel heat shield and a bayonet lug much like the M1897 trench gun. Also, like the ...

During the First World War, the Winchester M1897, fitted with the M1917 bayonet ... designations to refer to a shotgun with a heat shield fitted for a bayonet: Riot Gun with Bayonet Adapter ...