A towed artillery carriage configuration where the gun is mounted between two wheels with a box-like structure connecting them.

High Explosive (HE) round: an artillery or mortar projectile containing explosive filler designed to inflict damage through blast and fragmentation effects.

Recoil system using a combination of liquid and compressed gas to absorb and return energy from firing.

A breech mechanism in artillery where a solid block slides horizontally to open and close the breech for loading.