M1922 Bang rifle

The Model 1922 Bang rifle is a US semi-automatic rifle designed by the Danish arms designer Søren Hansen Bang. It was a modification of the earlier Models of 1909 and Model 1911 Bang rifles, both chambered in the .30-06 Springfield round.

M1922 rifle
The Model 1922 Bang rifle using the sliding muzzle-cap system.
Type	Semi-automatic rifle
Place of origin	United States
Production history
Designer	Søren Hansen Bang
Specifications
Cartridge	.30-06 Springfield, 6.5×55mm Swedish
Action	gas-operated, rotating bolt
Sights	iron sights

It was gas operated, using a sliding muzzle cup system which was blown forward by the combustion gases while the bullet emerged from the barrel. During field trials in 1919 and 1927, the rifle was demonstrated by the designer.[1] Because of its mechanical complexity and its susceptibility to gas fouling of the sliding muzzle cup, it was unsuccessful in US government testing.

The Bang blow-forward gas system, originally developed in 1903, inspired severeral other weapon developments: It was used in the unsuccessful French Puteaux APX machine gun of 1904 and its direct successor, the controversial St. Étienne Mle 1907 machine-gun. Also in the Gewehr 41 where it suffered the same shortcomings.