The 155 GH 52 APU (which stands for 155 mm gun-howitzer, 52 calibers, auxiliary power unit), Finnish designation 155 K 98 (155 mm kenttäkanuuna 1998 or "155 mm field gun 1998"; FDF terminology does not recognise gun-howitzers), is a Finnish towed artillery piece developed in 1998. It is largely based on the 155 K 83 with some major enhancements.

Mounted on the forward part of the carriage is the APU, a Deutz air-cooled turbocharged diesel developing 104.6 hp, coupled to a hydrostatic transmission which in turn powers the four motors located one at each wheel station.

The M109 is an American 155 mm turreted self-propelled howitzer, first introduced in the early 1960s to replace the M44. It has been upgraded a number of times, most recently to the M109A7. The M109 family is the most common Western indirect-fire support weapon of maneuver brigades of armored and mechanized infantry divisions.

The Armored Personnel Unit (APU) was a hydraulic mechanized walker designed for combat. They formed part of the primary line of defense for Zion. They made their brief first appearance in The Matrix Reloaded, but were seen more prominently in The Matrix Revolutions.

Further changes included the addition of a small APU to allow the gun to dig itself in and move short distances at up to 16 kilometres per hour (9.9 mph), as well as the addition of an advanced muzzle brake. The G5 became operational in 1983.

155 GH 52 APU is a Finnish gun developed in 1998. It is an enhanced and upgraded version of the 155 K 83. The acronym APU stands for auxiliary power unit, which means that in can be moved on the field for short distances with its own auxiliary diesel engine.

The 155/52 APU SBT howitzer is at the cutting edge of large caliber artillery. Its features guarantee its effectiveness and operability as a result of: high mobility cross-country, inertial navigation, ballistic computing, high rate of fire, range over 40 km with base bleed ammunition, simple operation, easy to maintain.

The 155 GH 52 APU (which stands for 155 mm gun-howitzer, 52 calibers, auxiliary power unit), Finnish designation 155 K 98 (155 mm kenttäkanuuna 1998 or "155 mm field gun 1998"; FDF terminology does not recognise gun-howitzers), is a Finnish towed artillery piece developed in 1998. It is largely based on the 155 K 83 with some major enhancements.

The 155 GH 52 APU is a 155-mm towed artillery system built by Patria. It is designated the 155K98 in Finnish army service. The K98 is an upgrade of the earlier M-83 towed howitzer. It is generally operated by a crew of nine, but can be operated by a crew of as few as two for short periods and at a lower rate of fire.

The Model 839P is a version of the Soltam M839 howitzer, fitted with an Auxiliary Power Unit (APU) for self-propulsion and various gun services such as opening and closing the trail legs. It was first demonstrated in 1983.