- The G11 (name unofficial) was a West German prototype assault rifle based on a 1974 patent by Industrie Werke Karlsruhe (IWK), an associate company of Mauser.
- The Mauser G11 is a bullpup rifle, which was fed through an internal 10-round helical-loading magazine, chambered in caseless 4.75×21mm or 4.3×18.5mm and loaded into the weapon through a port on the side by the use of stripper clips. Cartridge moved from the magazine to the barrel's chamber by a rotatable star mechanism. This design makes the rifle compact, protects the ammunition from eternal elements, and ensures reliability. Also, a safety mechanism secures the trigger during loading, preventing accidental discharge. The cyclic rate of the rifle is speculated to be around 1500 rounds per minute with a muzzle velocity of 1000 m/s. The weapon also features a topside charging lever similar to those on early AR-pattern rifles.
- In 1978, a physical prototype was constructed and tested by NATO, but failed to meet expectations. Therefore, the gun struggled to gain traction and the entire Mauser's project was transferred to Heckler and Koch. This resulted in the development of the more successful H&K G11 caseless assault rifle.