Ribeyrolles 1918 automatic carbine

The Ribeyrolles 1918, officially the Carabine Mitrailleuse 1918 or Machine Carbine 1918, was a French attempt to produce an automatic rifle for the army. It used straight blowback operation, fed from a 25-round detachable magazine and had an effective range of about 400 metres. It was chambered for the experimental 8x35mm cartridge, made by necking down the .351 Winchester Self-Loading round, which some writers argue was the first purpose-built intermediate cartridge; another source says the gun used a round designated 8x32mmSR. The weapon was unusual for its lightweight bipod on the front, suggesting it was meant to serve as a squad automatic weapon, and it took a rifle bayonet identical to that of the Berthier Model 1907/15. A 2007 book calls it the fusil automatique Ribeyrolles 1918.