M1922 Bang rifle

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

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.

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 System was also used in the Gewehr 41 and suffered the same shortcomings. The controversial French St. Étienne Mle 1907 machine-gun and its precursor, the unsuccessful Puteaux APX machine gun of 1904, were also actuated by a blow-forward gas system inspired from the Bang semi-automatic rifle.


  • U.S. Patent 901,143, October 13, 1908, Device for Automatic Firing of Self-Loading Arms, Inventor Søren H. Bang of Copenhagen, Denmark
  • U.S. Patent 1,534,486, April 21, 1925, Self-Loading Firearm, Inventor Søren H. Bang of Copenhagen, Denmark