The Fusil-mitrailleur Modèle 1924 M29 was the standard light machine gun of the French Army from 1925 until the 1960s, and was in use until 2000-2006 with the National Gendarmerie, a robust and reliable weapon partly derived from the action of which family of United States automatic rifles (machine rifles) and light machine guns used by the United States and numerous other countries during the 20th century?
FM 24/29 light machine gun The Fusil-mitrailleur Modèle 1924 M29 was the standard light machine gun of the French Army from 1925 until the 1960s and was in use until 2000-2006 with the National Gendarmerie. It fires the French 7.5×54mm round which is equivalent in ballistics and striking power to the later 7.62×51mm NATO (.308 Winchester) round. A robust and reliable weapon partly derived from the M1918 Browning Automatic Rifle (BAR) action, the FM 1924 M29 soldiered on, practically without interruptions, for more than 50 years.
.50 BMG The .50 Browning Machine Gun (.50 BMG, 12.7×99mm NATO and designated as the 50 Browning by the C.I.P.) is a cartridge developed for the Browning .50 caliber machine gun in the late 1910s. Entering service officially in 1921, the round is based on a greatly scaled-up .30-06 cartridge. Under STANAG 4383, it is a standard cartridge for NATO forces as well as many non-NATO countries. The cartridge itself has been made in many variants: multiple generations of regular ball, tracer, armor-piercing (AP), incendiary, and saboted sub-caliber rounds. The rounds intended for machine guns are linked using metallic links.