The Lance Grenades de 50 mm modèle 37 was a French light infantry mortar designed and produced shortly before the Second World War.

It was a simple weapon with a fixed elevation of 45°, with the range being set by twisting a ring on the base which varied the diameter of gas vents on the tube.

[citation needed] The modèle 37 remained in the French inventory until the end of the First Indochina War when it was retired.

[4] After the French defeat the Germans converted modèle 37 ammunition to serve as sub-munitions for their AB 70-D1 cluster bombs.

Another German conversion was the Behelfsmine W-1 which consisted of removing the nose fuze and tail fins then adding a Buck chemical crush fuze to the projectile and using it either as a small anti-personnel mine or as a booby trap.