|Carabine-mitrailleuse Ribeyrolles Modèle 1918|
|Place of origin||France|
|Used by||French Army|
|Wars||World War I|
|Produced||1916 to 1920|
|Weight||5.1 kg Unloaded|
|Length||1090 mm|
|Barrel length||450 mm|
|Rate of fire||550–600 rounds per minute|
|Muzzle velocity||570 m/s|
|Effective range||400 m|
|Feed system||25-round box magazine|
|Sights||Graduated sights up to 500 m|
The Ribeyrolles 1918 was an attempt to manufacture an automatic rifle for the French forces. It was chambered in the experimental 8×35 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 8×32 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.
- "Assault Rifles And Their Ammunition:". Quarry.nildram.co.uk. 1943-07-15. Archived from the original on June 2, 2014. https://web.archive.org/web/20140602021550/http://www.quarry.nildram.co.uk/Assault.htm. Retrieved 2011-02-15.
-  has info from Jean Huon (2007). Les pistolets mitrailleurs français. Editions Crépin-Leblond. ISBN 978-2-7030-0300-7. cf. 
- "French .351 W.S.L.". iaaforum.org. http://iaaforum.org/forum3/viewtopic.php?f=8&t=9349&start=15. Retrieved 2011-02-15.
- "8x35 Ribeyrolle /". Municion.org. http://www.municion.org/8/8x35Ribeyrolle.htm. Retrieved 2011-02-15.
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