KTO Rosomak (ZSSW-30)

PiekarzV2 · February 27, 2026, 9:17pm

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KTO Rosomak with ZSSW-30

History

The ZSSW-30 turret dates back to 2014 when it’s mockup was revealed during MSPO 2014,
it was to be the armament of KTO Rosomak and future amphibious IFVs developed under the Borsuk program.

In May 2015, during a closed show at the training ground in Stalowa Wola, a shooting test of the prototype, installed on a test Rosomak, was officially carried out. According to unofficial assessments of soldiers previously firing from a manned, standard Rosomak turret - the new one achieved much better grouping.

Early prototype fire test results

ZSSW-30 qualification testing began in January 2020 and was divided into several stages. Two of the three ZSSW-30 prototypes were assigned to this task (the third was used on the prototype of the New Amphibious Infantry Fighting Vehicle “Borsuk”). The turrets designated for qualification testing were mounted on the chassis of Rosomak, their first operational user.

In the second half of November 2020, the integration and capabilities of a dedicated anti-tank system were tested at the Nowa Dęba training ground. The ZSSW-30 utilizes a dual Spike-LR (Spike-LR2) ATGM launcher for this purpose. However, the test using the anti-tank missiles required the presence of manufacturer representatives, which, due to the pandemic and the isolationist policies of the State of Israel at the time, led to turbulence and delays. Ultimately, however, Rafael representatives arrived in Poland and trained specialists from Huta Stalowa Wola and WB Electronics in the operation of the Spike ATGM launcher using the Indoor Trainer stationary simulator. Following the training, five missions were conducted using live Spike missiles.

The test results were not disclosed, but were generally described as “very satisfactory.” After the firing stage, tests were planned in specialized chambers to verify the correct operation of the ZSSW-30 in extreme temperatures, and the electromagnetic compatibility of various subsystems and devices operating simultaneously.

According to the contractor, no conclusions requiring design adjustments were drawn after qualification tests conducted in the fall of 2020. This situation was intended to allow for negotiations with the Armament Inspectorate to begin in early 2021.

First ZSSW-30 turrets for KTO Rosomak were delivered in December 2023 to the Rzeszów 1st Podhale Rifle Battalion of the 21st Podhale Rifle Brigade. The delivery is the first part of the order for 70 ZSSW, which was placed on July 5, 2022.

Characteristics

Armament

Turret: ZSSW-30
- Horizontal/Vertical guidance speed: at least 0.7 rad/s (≈40.1 deg/s)
30mm Bushmaster Mk.44S
- Elevation: -9°/+60°
- Two-plane stabilizer
- Fire rate: 200 rpm
- Ammo capacity: 200 rds (100+100) ready racked, at least 300 rds stored in hull
- Ammo feeding: Dual-feed
Ammo:
- APFSDS (NM 225) (already in game)
- FAPDS-T (domestic)
  - Projectile weight: 235 g
  - Cartridge weight: 750 g
  - Muzzle velocity: 1385 m/s
  - Charge weigth: ~172 g (2654,32 gr)
  - Dispersion: ≤ 0.4 mils at 1 000 m
  - Penetration: 30 mm RHA 60° NATO at 1000 m
- MP-T/SD (NM 222)
  - Projectile weight: 363 g
  - Cartridge weight: 835 g
  - Muzzle velocity: 1 070 m/s
  - Charge weight: ~148 g (2283,95 gr)
  - Maximum dispersion: < 0.4 mils at 1 000 m
  - Penetration: 10 mm RHA 60° NATO at 1000 m
  - Tracer: ≥ 4.6 s
  - Self-destruction: Yes
7,62 mm UKM-2000C
- Ammo capacity: 400 rds ready racked, 1600 rds stored in hull
- Rate of fire: 700-900 rpm
- Velocity: 850 m/s
- Range 1500 m
- Length: 1058 mm
- Barrel length: 521 mm
2 x Spike LR launcher
- Ammo capacity: 2 ready to use, 4 stored in hull

Mobility

Engine: Scania DI 12 49 A 03 P
- power: 360 kW / ≈489 PS @ 2100 rpm
- Max torque: 1974 Nm @ 1500 rpm
Transmission: ZF 7HP902 S Ecomat
- Gears: 7 forward, 1 reverse
- Max speed: 100 km/h
Turn radius: 12 m
Combat weight: 22 650 kg

Armor

STANAG 4569 protection
- Turret front, sides and back: Level II
- Hull Front: Level IV
  Sides and back: Level III

Hull is made of 8 mm of ARMSTAL 500 (HHA) and front from ARMSTAL 550 while floor is made of ARMSTAL 450

Side panels mounted on the hull are made of 6mm ARMSTAL 500 with 35mm air gap which can be filled with foam to enchance protection

(educational cross-sections of the KTO Rosomak chassis)

optics, electronics

Gunner optic: GOC-1 NIKE
- Angular guidance speed: 1 rad/s (≈57.3 deg/s)
- Two-plane stabilizer
- Thermal camera
  - 3-rd generation
  - Wide FOV: 10°
    Narrow FOV: 3.1°
- Day camera
  - Wide FOV: 10.7°
    Narrow FOV: 3.3°
Commander optic: GOD-1 IRIS
- Angular guidance speed: 1 rad/s (≈57.3 deg/s)
- Two-plane stabilizer
- Thermal camera
  - 3-rd generation
  - Wide FOV: 10°
    Narrow FOV: 3.1°
- Day camera
  - Wide FOV: 10.7°
    Narrow FOV: 3.3°
Driver opitc:
- PNK-72 night vision
  - FOV: 30°
Laser warning system: OBRA-3

NBWP-Borsuk-24akopsa1200×945 259 KB

ZSSW-30 on BWP Borsuk
- Detection angular range in vertical plane: -6°/+30°
- Detection angular range in horizontal plane: 360°
- Dange of detected radiation: 0.6 μm – 11 μm.
Laser rangefinder
Video tracker
Commander can shoot in emergency situations

Dimensions

Overall length (A): 7880 mm
Front overhang (B): 1760 mm
Wheelbase (C): 1400 mm
Wheelbase (D): 1700 mm
Wheelbase (E): 1450 mm
Overall width (F): 2830 mm
Front track (G): 2450 mm
Ground clearence (H): 430 mm
Height with turret (I): ? mm

Summarized characteristics

Crew (3)
- Driver, gunner, commander
30mm Bushmaster Mk.44S
- Ammo: APFSDS-T (NM 225), FAPDS-T (domestic), MP-T/SD (NM 222)
- Elevation: -9°/+60°
- Two-plane stabilizer
- Fire rate: (200 rds/m)
7,62 mm UKM-2000C
2x Spike LR launcher
Commander sight
- 3rd Gen thermals
Gunner sight
- 3rd Gen thermals
LWS Obra 3
Laser Rangefinder
6 x 81mm Gak-81 smokes
Combat weight: 22,6 t
Engine: Scania DI 12 360 kW / ≈489 PS
- Max speed: 100 km/h
- Max speed in water: 10 km/h
Length 7,88 m Width: 2,83 m Height: ? m