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 device attached to a firearm's muzzle to redirect propellant gases, reducing recoil and muzzle rise during firing.

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

A towed artillery carriage configuration where the gun is transported with its two wheels separated, allowing for easier deployment and lower profile when in firing position.