The 7.5 mm MAS mod. 1924 was a short-lived French rifle ammunition type that was introduced in the mid-1920s to replace the 8 mm Lebel

8 mm Lebel

The 8×50mmR French rifle cartridge was the first smokeless gunpowder cartridge to be made and adopted by any country. It was introduced by France in 1886. Formed by necking down the 11 mm Gras black powder cartridge, the smokeless 8 mm Lebel cartridge started a revolution in military rifle...

. The "Lebel" round was powerful and accurate but due to its shape it was particularly poorly suited to automatic weapons with large-capacity magazines. The only weapon ever fielded in 7.5 mm MAS mod. 1924 was the fusil-mitrailleur mle 1924, an automatic rifle

Automatic rifle

Automatic rifle is a term generally used to describe a semi-automatic rifle chambered for a rifle cartridge, capable of delivering both semi- and full automatic fire...

 sharing similarities with the B.A.R

Browning Automatic Rifle

The Browning Automatic Rifle was a family of United States automatic rifles and light machine guns used by the United States and numerous other countries during the 20th century. The primary variant of the BAR series was the M1918, chambered for the .30-06 Springfield rifle cartridge and designed...

. Early examples of the FM 24 proved prone to various failures; additionally, it was possible to mistake the new 7.5 x 57 mm with a German 7.92x57mm Mauser

7.92x57mm Mauser

The 8×57mm IS is a rimless bottlenecked rifle cartridge. The 8×57mm IS was adopted by the German Empire in 1905, and was the German service cartridge in both World Wars...

 round. The new 7.5 mm round was abandoned and replaced by the 7.5x54mm MAS mod. 1929.

Sources

• Ferrard, Stéphane. France 1940 l'armement terrestre, ETAI, 1998, ISBN 2-7268-8380-X