Haizum howitzer

The Haizum (Tipsprek: Kanoneferager 4.5T «Hazjum») is a Tiperyner and Kayan 147mm wheeleed. It is based on the Kayan 8×8 Samoyed series of tactical trucks, which is the most common heavy tactical truck in Tiperyner service. It was adopted as a replacement for towed 147mm (Tiperyner 4.5-inch) howitzers in wheeled mechanized formations, such as Tiperyn's Continental Contingency Regiments (KKR) and Kaya's Redhorn and Jade Serpent Banner Armies. Its name is derived from the, as its cannon is designated «Gabrjel».

As of 2023, the Haizum was the most numerous 147mm self-propelled guns in the Tiperyn and Kayan militaries. In the Tiperyn Realm Guard, 15 cannon battalions are planned to be equipped with Haizum by 2026, compared to eight battalions equipped with the tracked 147mm «Aurjel». In the Kayan Unified Armies, there are 12 Haizum battalions and four armored artillery battalions. However, there are more 115mm self-propelled guns in both militaries, acting as regimental guns in the Kayan military and "direct support" guns in Tiperyner cannon regiments supporting specific maneuver regiments. The 147mm guns typically act in support of division-sized elements.

Armament
The Haizum is defined by its use of a 147mm L/51 cannon, designated in Tiperyn service as Kanon 4.5T «Gabrjel». The "4.5T" comes from 4½ Tiperyner inches and not tonnes. Generally, for marketing and export purposes, Tiperyn self-propelled howitzers are labelled as Haizum provided they are equipped with the Gabrjel cannon, have no turret, and are mounted on a heavy truck chassis.

The 147mm L/51 is capable of hitting targets up to 50 km away with the newest rocket-assisted projectiles or GPS-guided shells at full charge (fired at maximum elevation), 41 km with extended-range base-bleed shells, or 35 km away with standard HE shells. The Haizum can carry 28 complete rounds onboard in ammunition containers mounted on both sides of the vehicle forward of the gun. It features a semi-automatic loading system whereby two loaders on each side of the gun can stage the following shot in side-mounted trays, which are automatically swung and rammed into the gun. This allows for reduced strain on the gun crew, a smaller crew overall, and a maximum fire rate of 6 rounds per minute, although the maximum sustained fire rate is 1-2 depending on the charge as limited by gun's temperature sensor.

Mobility
Haizums built for the Tiperyner, Kayan, and Ringeriker militaries are based on the Samoyed 8x8 tactical truck, while versions built for the Sannlig military are based on the Lastebil 19 8x8. Both version are mobile off-road, with the intent of being able to keep up with wheeled mechanized forces in a close support role.

A key requirement of the Haizum program was to fit in Tiperyn and Kaya's medium airlifters. In its airlift configuration, the Haizum has a footprint of 11.3 metres long by 3.16 metres tall by 2.35 metres wide. It accomplishes this by depressing its gun into a recess in the cab/engine compartment roof, deflating the tires via the, manually removing the outriggers (if length is an issue), and lowering the suspension to the minimum ground clearance. Daiamondeu claims that when the outriggers are not removed, the Haizum can be made ready to fire within three minutes in an air transportable configuration. This minimized profile allows one Haizum and cargo to be carried by a or KIA Parsifala, and two to be carried by Ares Albatross. However, it can not be transported by the Pandur tactical airlifter.

Summary table
{{legend|#F2CECE|Training only }}
 *  Kaya - In service as Gun Carriage 452. Kaya initially ordered 234 Haizums, delivered between 2014 and 2025. Nine battalions make up the bulk of the artillery in Cannon Regiments subordinate to the Jade Serpent and Redhorn Banner Armies, which are wheeled mechanized infantry formations. One battalion acts as a heavy follow-on artillery capability for the airmobile Morning Star Banner Army. An additional 18 act as training pieces and spares. No additional orders were announced as of 2023.
 *  Ringerike - Adopted as a lower-cost complement to the Katapult Artillery System to replace towed artillery. They are employed in four line artillery regiments and one training battery.
 *  Sannlibo - Sannlig Land Forces: The SLF introduced 240 systems into service along the reserve divisions.
 *  Tiperyn - In service as Kanoneferager 4.5T «Hazjum». Tiperyn initially ordered 405 Haizums for the Realm Guard (15 battalions), 54 for the Fleet Expeditionary (3 battalions), 50 for joint operational float, and 27 for training. These are to be delivered from 2014 to 2026. A second order was made in 2023 for about 207 additional platforms with a projected delivery date of 2028. This will provide an additional 7 battalions to the Fleet Expeditionary and 3 battalions to the Realm Guard.