The Gewehr 43 or Karabiner 43 is a 7.92×57mm Mauser caliber semi-automatic rifle developed by Germany during World War II. The design was based on that of the earlier G41(W) but incorporated an improved short-stroke piston gas system similar to that of the Soviet SVT-40.
Gewehr 43 from the collections of the Swedish Army Museum
The 7.92×57mm Mauser is a rimless bottlenecked rifle cartridge. The 7.92×57mm Mauser cartridge was adopted by the German Empire in 1903–1905, and was the German service cartridge in both World Wars. In its prime, the 7.92×57mm Mauser cartridge was one of the world's most popular military cartridges. In the 21st century it is still a popular sport and hunting cartridge that is factory-produced in Europe and the United States.
From left to right 7.92×33mm Kurz, 7.62×39mm, 5.56×45mm NATO, 7.62×51mm NATO, .303 British, 6.5×55mm Swedish, 7.92×57mm Mauser, and .30-06 Springfield military cartridges
1888 pattern M/88 (left) parent cartridge alongside the 1903 pattern 7.92×57mm Mauser S Patrone.
Karabiner 98k stripper clip with brass-cased 7.92×57mm ammunition
MG 34 with inserted 7.92×57mm Gurt 34 ammunition belt