Mod.31) was an artillery piece developed in 1931 for the Belgian Army which saw widespread service in the Battle of Belgium in 1940.

It was developed by the firm F.R.C., the Herstal-based Fonderie Royale de Canons, not to be confused with the French F.R.C.

In contrast, the Light Troops version was equipped with pneumatic tires for greater road mobility.

[6] They were also attached to Belgian combat vehicles of WWII as support weapons, such as the T-13 tank destroyer and the 'Canon antichar automoteur Vickers-Carden-Loyd Mk.VI'.

For instance, armor-piercing rounds could penetrate 47 millimetres (1.9 in) of armored steel at a range of 300 metres (980 ft).

[3] This type of damage was largely attributed to the heavy caliber design with a shell weight of 1.52 kilograms (3.4 lb) for the armor-piercing rounds.