Ribeyrolle 1918 automatic carbine

The Ribeyrolles 1918 was an attempt to manufacture an automatic rifle for the French forces. It was chambered in the experimental 8x35 mm round, used straight blow-back, was fed from a 25 round magazine and had an effective range of 400 m. The cartridge, arguably the first purpose-built intermediate cartridge, was obtained by necking it down the .351 Winchester Self-Loading. Another source indicates that it was chambered in a cartridge designated 8x32 mmSR.

Its official name was Carabine Mitrailleuse 1918 (Machine Carbine 1918 in English); in a 2007 book it appears as "fusil automatique Ribeyrolles 1918". The Ribeyrolles had the distinction of being fitted with a lightweight bipod on the front (which would be meant to be used as a support weapon for a group of soldiers) and a rifle bayonet identical to that of Berthier Model 1907 / 15.