Kanon 77

The Kanon 77 was developed as a replacement for the K.52, which was seen as no longer fitting the more mobile doctrine of the Ringerike Army, as even short tactical movements of the K.52 required an unacceptable amount of time to pack up and move, the solution for this came in the form of the K.77's APU, which makes the Howitzer capable of driving itself for the aforementioned short tactical movements, as well as this the Howitzer's APU can be started and controlled by the driver of the towing vehicle to give an extra boost during off-road driving. In parallel with the development of the Kanon 04 it was decided that the K. m/77 would undergo a series of upgrades using shared technologies, such as the muzzle velocity measuring device (MVMD) and LINAPS artillery pointing system (APS) as well as their related display system, allowing the K.77 to be linked into existing digital fire control networks the new model guns were also fitted with L/45 barrels increasing their firing range to a maximum of 38km. This new gun, the K.77F1 is was designed to remain in service while the regular army received a much more mobile, but expensive platform, the Katapult Artillery System.

Kystkanon 120mm m/80
The Kystkanon 120mm m/80 was introduced in 1980 for use by the coastal artillery, it uses the same carriage but fires the 120mm Fixed ammunition also employed by naval surface combatants with a maximum range of 32km at a rate of 16rpm.