Noricum, the arms division of the Austrian steel company Voestalpine, purchased the design rights to the GC-45 howitzer after Space Research Corporation moved to Brussels.

They made a number of detail changes to improve mass production, resulting in the GHN-45 (Gun, Howitzer, Noricum), which was offered in a variety of options like the APU and fire-control systems.

[2] Secondary weapons include a roof-mounted W-85 heavy machine gun and two sets of four-barrel smoke grenade launchers on the turret's side.

Designed to defeat armoured vehicles and weapon emplacements, the projectile has inertial mid-course guidance and semi-active laser homing.

[2][3] A standard PLZ-45 battalion consists of 3 batteries, each with 6 PLZ-45 self-propelled howitzers (SPH) and 6 PCZ-45 ammunition support vehicles (ASV).

[3] The PLZ-45 self-propelled howitzer is powered by a 525 hp Deutz turbocharged air-cooled diesel engine, giving a max road speed of 55 km/h (34 mph).