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

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. This ".256 Bang" rifle was a top candidate from 1925 to 1928 for US contracts ultimately won by the M1 Garand. Bang himself demonstrated his own models in US field trials in 1919 and 1927.^[1] The Bang rifle was ultimately unsuccessful in US government testing because of its mechanical complexity and susceptibility to gas fouling of the sliding muzzle cup.

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

• 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

Wikimedia Commons has media related to Bang rifle.

• material #2 from Forgotten Weapons
• Hatcher's Notebook by Julian S. Hatcher, 1952, The Stackpole Company.