Abstract: A medium caliber automatic firearm with a high firing rate including a star drum which revolves in indexed fashion and which is in line with and driven by a cylinder star wheel, whose rotation is synchronized with that of the star drum, is mounted to the side of and is parallel to the star drum. A stripper is mounted between the star wheel and the star drum in order to separate cartridges from links at a point where the ammunition belt comes out of the star wheel while allowing the links to be evacuated from the firearm. A mechanism is also included which introduces the cartridges into successive chambers of the cylinder, the cartridges being lined up with the chambers by a star drum as the latter rotates.

Abstract: A dual ammunition feed for automatic weapons includes a positioning device for the ammunition wherein a central positioning sprocket unit interacts with two feed sprocket units in two separate feed casings to allow for loading with two different types of ammunition. The feed casings are tiltable into and out of engagement with the positioning device, the tilting of a particular feed casing into engagement with the positioning device being followed by the simultaneous disengagement of the other feed casing from the positioning device. The tilting of a particular feed casing into engagement further results in the coupling of the engaged feed casing's feed sprocket unit with a reducing transmission driven by an external motor, and in a change in the rotational direction of the central positioning sprocket unit such that the central positioning sprocket unit always rotates in an opposite direction from that of the feed sprocket unit of the particular feed casing which is engaged.