The Carabine Mitrailleuse 1918 (English: Machine Carbine 1918), or simply the Ribeyrolles 1918, was an attempt to manufacture an automatic rifle for French forces. Named after its designer Ribeyrolles (who had previously worked on the Chauchat and the RSC 1917), it fired what is considered an intermediate cartridge (similar in capabilities to an assault rifle cartridge) at 550-600 rounds per minute. It was to be fitted with a bayonet and bipod, intended to be used in a supporting role similar to a light machine gun.
The Optical variant was introduced in the Weapon Crate update on May 7 2018. The variant is equipped with a lens sight.
It is notable for being one of two Assault primaries with a bipod - the other being the Hellriegel 1915 Defensive - providing long range capability for the kit. Performance is otherwise similar to the MP 18, which has a larger magazine and better hipfire statistics.