The Vollmer M35 is a prototype Nazi assault rifle.
The rifle was designed by Heinrich Vollmer. It was chambered in an intermediate cartridge that was co-developed by Gustav Genschow and Co., also known as GECO, under a Heereswaffenamt (German Army Weapons Agency) contract. The weapon was developed for both the Reichswehr and the Deutsches Heer, with the Deutsches Heer testing the weapon first. However, Nazi Germany decided to adopt a different intermediate cartridge and assault rifle, leading to the MkB 42, leading to the StG 44.
The M35 was gas-operated, and its operation was very similar to an older weapon made by Vollmer, the SG 29. Trials with this weapon were conducted in Biberach as early as 1935, later moving to Kummersdorf. Early prototypes fed from a 20 round detachable box magazine, and fired at an astounding 1000 rounds per minute. Later prototypes had the rate of fire intentionally reduced to 300-400 RPM.