M 1917 revolver

Used as a side arm, mainly by American officers.  This was a six shot revolver firing 0.45 inch bullets.  It weighed about a kilogram and was 270 millimetres long.  It was first issued during the First World War but was still in service during the Korean War and would even be used by tunnel rat units during the Vietnam War to clear Viet Cong underground tunnel systems.

M 1917 revolver
M 1917 revolver