M1922 Bang rifle

The Bang M1922 was a semi automatic rifle of US Origin designed by the Danish arms designer Søren Hansen Bang. It was a modification of the 1909 models both chambered in the .30-06 Springfield round. During field trials in 1919 and 1927, the rifle was demonstrated by designer Søren H. Bang. It was gas operated, using a sliding muzzle cup system blown forward by the combustion gases while the bullet emerges from the barrel. Ultimately, it was not successful primarily because of its mechanical complexity and also because of its susceptibility to gas fouling of the sliding muzzle cup. It was tested by the US Government in 1911, and according to Hatcher, however, he remarked that, "it functioned exceptionally well" during the trials. The Bang system was also used in the Gewehr 41 and suffered the same shortcomings.

Patents

 * , October 13, 1908, Device for Automatic Firing of Self-Loading Arms, Inventor Søren H. Bang of Copenhagen, Denmark
 * , April 21, 1925, Self-Loading Firearm, Inventor Søren H. Bang of Copenhagen, Denmark