AHS Krab

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Polish 155 mm self-propelled howitzer

title: "AHS Krab" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["self-propelled-howitzers-of-poland", "science-and-technology-in-poland", "155-mm-artillery", "tracked-self-propelled-howitzers", "military-vehicles-introduced-in-the-2000s", "huta-stalowa-wola-vehicles"] description: "Polish 155 mm self-propelled howitzer" topic_path: "geography/poland" source: "https://en.wikipedia.org/wiki/AHS_Krab" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Polish 155 mm self-propelled howitzer ::

::data[format=table title="Infobox weapon"]

Field	Value
name	AHS Krab
image	File:AHS Krab SPH Exercise Dynamic Front 22.jpg
image_size	300
caption	AHS Krab, a self-propelled tracked howitzer
type	Self-propelled artillery
origin	Poland
is_ranged	y
is_artillery	y
is_vehicle	y
service	2016 – present
used_by	Polish Land Forces
Ukrainian Ground Forces
wars	Russian invasion of Ukraine
designer
design_date	1997–2016
manufacturer	Huta Stalowa Wola
unit_cost	US$11.45M (est)
production_date	2008 – present
mass	48 t
length	12.1 m
part_length	8.06 m L/52
width	3.63 m
height	3 m to turret roof
crew	5
caliber	155 mm
rate
max_range
breech	Sliding block
elevation	+70° (1244 mils)/-3.5° (-62 mils)
traverse	360° (6400 mils)
armour	Max 16 mm steel armour
primary_armament	155 mm/52-calibre howitzer
40 rounds (29 turret, 11 hull)
secondary_armament	WKM-B .50 BMG
engine	STX Engine/MTU Friedrichshafen MT881Ka-500 8-cylinder water-cooled diesel engine
engine_power	1000 hp
drive	Tracked
transmission	SNT Dynamics/Allison Transmission X1100-5A3
4 forward, 2 reverse
suspension	Mottrol/Horstman Hydropneumatic Suspension Unit (HSU)
travel distance: ≤ 275 mm
dead weight: 40 ~ 45 kN
vehicle_range	400 km
speed
ref	Janes
::

::figure[src="https://upload.wikimedia.org/wikipedia/commons/8/8c/WB_Topaz_mspo1.jpg" caption="WB Electronics Topaz FCS"] ::

The AHS Krab (Polish for crab) is a 155 mm NATO-compatible self-propelled tracked gun-howitzer designed in Poland by Huta Stalowa Wola (HSW), by combining a modified South Korean K9 Thunder chassis with a British BAE Systems AS-90M Braveheart turret with a 52-calibre gun produced by HSW and the Polish WB Electronics' Topaz artillery fire control system. "AHS" is not a part of the name, but the Polish abbreviation of armatoh*aubica samobieżna* – gun-howitzer, self-propelled.

The 2011 prototype version used Nexter Systems barrels and UPG-NG chassis from domestic company Bumar-Łabędy.

For the production variant, since 2016, Poland decided to base the self-propelled howitzer on a modified K9 chassis with an STX Engine-MTU Friedrichshafen engine and, since 2019, uses barrels made domestically by HSW (earlier, the barrels were delivered by Rheinmetall).

History

The cannon was developed within the "Regina" research framework. The program's goal was to create a 155 mm calibre long-range artillery piece for the Polish Army that would serve as a division-level asset. It was decided, that instead of buying a licence for a complete vehicle, only a licence for a modern L/52 gun and turret would be bought, and they would be mounted on domestically developed chassis.

In 1997 a competition for an artillery component, a complete turret with a gun, was announced. The British AS-90M won the competition, the other contestant was the PzH-2000. In 1999 its technology was transferred to Huta Stalowa Wola factory. The UPG-NG chassis was developed in Poland by OBRUM in Gliwice, from an SPG-1M chassis, itself developed from a Soviet MT-S tractor, using parts combined with the PT-91 Twardy tank. The first prototype was completed in 2001, and the second the following year.

The first two prototypes of the howitzer are fitted with turret systems supplied by BAE Systems. It was planned to complete the first squadron in 2008, but the program was delayed due to financial reasons, and not until 2008 did the Polish Army order the introductory batch of the squadron module, completed in 2012. It covers eight guns (six new-built and two upgraded prototype vehicles), command vehicles (on a much modernized MTLB chassis), as well as ammunition and repair vehicles for the ordnance and electronics.

In the introductory and series products, Nexter guns replaced the original British pieces. The trial firing of another gun supplied by the manufacturer continued every month through the end of the year. The third gun was tested on 10 August under the supervision of representatives of the Armament Inspectorate and the Head Office of the Missile and Artillery Force of the Air Forces, at the Dynamic Trial Center of the WITU, the Military Technical Institute of Armament, in Stalowa Wola.

The first firing of the third complete Krab, which also received new elements of onboard electronics developed by WB Electronics, occurred in July 2011. The concentration of fire was among the requirements tested. As of 2012, two prototypes and eight initial units, two artillery batteries each with four guns, had been built by Huta Stalowa Wola. In 2012–2013 eight new examples were used for tests conducted by the Polish Army as a part of a "Regina" battery command module.

In December 2014, the Polish Ministry of Defence announced a deal worth US$320M with Korean firm Samsung Techwin (now Hanwha Techwin) to purchase 120 K9 Thunder chassis, with the first 24 to be delivered in 2017 and 96 to be built under licence in Poland in 2018–2022. Poland also evaluated the Turkish-built T-155 Firtina chassis of the same origin.{{cite web |url=http://www.altair.com.pl/mspo-report/view?article_id=498 |title=Kraba poniesie turecka Burza? |author= |date=3 September 2013 |website=Altair |publisher=Altair Agencja Lotnicza |location=Warsaw, Poland |language=pl |trans-title=Will the Crab be carried by the Turkish Storm? |access-date=2 July 2024 |archive-url=https://web.archive.org/web/20141218202456/http://www.altair.com.pl/mspo-report/view?article_id=498 |archive-date=18 December 2014}} The original Polish OBRUM'sOBRUM stands for Ośrodek Badawczo-Rozwojowy Urządzeń Mechanicznych (Polish: "Research and Development Centre for Mechanical Appliances") The UPG-NG chassis built by BUMAR, which had been used in the eight initial production howitzers and which was equipped with an S-12U engine and other elements (like road wheels) from the PT-91 Twardy, was abandoned due to structural cracks and ceased production of S-12U engines.

The first K9 chassis was shipped to Poland for testing and integration in June 2015. The prototype was rolled out in August 2015. It went through type acceptance testing in October 2015. The test ended successfully in April 2016, allowing series production. In April 2016, the Ministry of National Defence and the manufacturer concluded the research and development phase. In April 2016, during the Polish prime minister's visit to Stalowa Wola, the first two serial examples were handed over to the Polish Army.

They joined eight initial production examples at the Artillery Training Center in Toruń, and were used to develop operational standards for combat units. During the handover ceremony in November 2016, nine Krabs were accepted in the presence of the Polish Minister of National Defence, while seven more were in the acceptance testing phase. Eight original turrets on UPG chassis are scheduled to be upgraded to the K9 chassis after the first batch of 16 guns is delivered by the end of 2016. The deal for the next 96 units was signed in December 2016, raising total order to 120 Krabs for five regiments. Poland originally planned to import 36 chassis from South Korea and produce 84 chassis in Poland to deliver 120 vehicles by 2022. However, the schedule was extended to 2024 as Poland increased its domestic produced chassis from 84 to 96.

Each of the planned five regiments of Krabs will be equipped with 24 howitzers. The first unit to receive 24 Krabs by 2017 will be 11th Masurian Artillery Regiment in Węgorzewo. The development program of advanced, smart 155 mm ammunition was expected to conclude in 2017.

In late May 2022, the Polish government donated 18 Krabs to Ukraine to help the Ukrainian military defend the nation against the Russian invasion of Ukraine. The two governments signed a contract under which Poland will sell Ukraine an additional 60 Krabs, in a deal worth 3 billion złotys (US$700 million). With the deal, Ukraine became the first export customer for Polish Krabs. The agreement was the largest defence contract that Poland had made in the previous 20 years. In October 2022, Ukraine's Ministry of Defence Oleksii Reznikov revealed, that Poland had already donated three battalions of Krabs (i.e. 54 pieces with support vehicles), and another three were ordered.

Heavy IFV

In August 2023, the consortium of Polish Armaments Group (PGZ) and HSW signed a framework contract with Poland's MND Armament Agency to deliver 700 Ciężki Bojowy Wóz Piechoty (CBWP, Heavy Infantry Combat Vehicles) beginning in 2025. The vehicle's chassis will be made using elements of the Krab SPH fitted with the ZSSW-30 remote turret system to carry three crew and eight troops and engage various targets in direct contact while having a high level of ballistic and anti-mine protection.

Orders

::figure[src="https://upload.wikimedia.org/wikipedia/commons/6/66/Warszawa_–defilada„Silni_w_sojuszach”_(5).JPG" caption="Armed Forces Day]] parade in Warsaw"] ::

; Poland Polish Land Forces (152 to be delivered + framework agreement for 56) :60 vehicles in service as of December 2025. :* 1st order: 24 with chassis delivered from South Korea. Delivery completed in 2016. :* 2nd order: 96 in 2016 with delivery scheduled by 2024. 56 were delivered by 2022, but the schedule for the remaining 40 vehicles was postponed from 2022–2024 to 2025–2027 to prioritize Ukrainian order. ::* 2 trainers were added as part of the 2016 contract adjustment on 16 December 2020. Delivered in December 2025. ::* 54 vehicles were donated to Ukraine in 2022. :* 3rd order: 48 for a value of PLN 3.8 billion zlotys (USD $797 million) on September 2022. Delivery was postponed to 2025–2027 due to Ukrainian order. :* 4th order: 96 Krabs with command vehicles, command and staff vehicles, ammunition vehicles, and repair workshops worth PLN 9 billion was signed on 23 December 2024 as a part of the framework agreement for 152 Krab on 8 December 2023.. The delivery is scheduled by the end of 2029.

::figure[src="https://upload.wikimedia.org/wikipedia/commons/0/09/UA_AHS_Krab_05.jpg" caption="AHS Krab of a Ukrainian artillery brigade during [[Russian invasion of Ukraine"] ::

; Ukraine Ukrainian Ground Forces :Acquisition of 108 guns was completed in December 2024. At least 36 were destroyed, and at least 6 were damaged. :* Poland publically announced a donation of 18 Krabs; however, in October 2022, Ukrainian Minister of Defence Oleksii Reznikov confirmed 54 Krabs were donated.. :* 54 ordered in June 2022 for $700 million.

Operational history

Russian invasion of Ukraine

Ukraine reported that it used the weapon during fighting near Sievierodonetsk.

The AHS Krab was used during the 2022 Ukrainian eastern counteroffensive in Kharkiv Oblast.

In Autumn 2022 it was revealed that Ukraine used the Krab with Excalibur precision ammunition, obtaining a range over 50 km.

Losses

The OSINT analysis website Oryx has documented confirmed Ukrainian Krab losses at 36 units destroyed and 7 damaged.

Notes

References

(8 June 2022). "Krab 155 mm". Jane's Group UK.
"From 30 to 155 mm. Expanded Barrel Manufacturing Facility at HSW.".
Kwasek, Tomasz. ''Nowe szaty Kraba'' in: "Nowa Technika Wojskowa" Nr. 9/2015. P.16-24 {{in lang. pl
. (24 May 2011). ["Pozytywne wyniki badań działa dla Kraba."](http://www.altair.com.pl/news/view?news_id=6196). *Altair Agencja Lotnicza*.
. (8 October 2012). ["Kraby dla 11. MPA."](http://www.altair.com.pl/news/view?news_id=8763). *Altair Agencja Lotnicza*.
Palowski, Jakub. (18 December 2014). "Krab Howitzers to get Korean Chassis. PGZ Decision Ends the Crisis.". Defence24 Sp. z o.o..
. (26 June 2015). ["Pierwsze koreańskie podwozie dla Kraba"](http://www.altair.com.pl/news/view?news_id=16805). *Altair Agencja Lotnicza*.
Reszczyński, Jerzy. (24 August 2015). ""Krab" na nowej drodze życia?". Defence24 Sp. z o.o..
Reszczyński, Jerzy. (10 November 2015). "Testy poligonowe Kraba. "Ostatni etap przygotowań do produkcji seryjnej"". Defence24 Sp. z o.o..
Surowaniec, Zdzisław. (14 April 2016). "Krab gotowy do produkcji, huta czeka na zamówienia wojska". Polska Press Sp. z o.o..
Reszczyński, Jerzy. (7 April 2016). "Wojsko zgadza się na produkcję seryjną Kraba. Czas na eksport?". Defence24 Sp. z o.o..
"Kraby meldują się do służby". [[Armed Forces General Command (Poland).
Reszczyński, Jerzy. (21 November 2016). ""Artillery Deal of the Century" – Is it Maturing?". Defence24 Sp. z o.o..
Reszczyński, Jerzy. (11 February 2016). ""Krab" na ostatniej prostej". Defence24 Sp. z o.o..
Reszczyński, Jerzy. (14 December 2016). "Artyleryjski kontrakt stulecia podpisany. "Regina" za 4,6 mld zł.". Defence24 Sp. z o.o..
(29 June 2015). "Korea – Krab Chassis Shipped To Poland".
(27 August 2015). ""Krab" – A New Beginning?".
(21 November 2016). "Krab Howitzers for the Polish Army".
Reszczyński, Jerzy. (21 November 2016). "Krab Howitzers for the Polish Army". Defence24 Sp. z o.o..
Palowski, Jakub. (16 November 2016). "Amunicyjno-artyleryjska karuzela w Sejmie. Prace nad pociskami dla Raka, Kraba, Leopardów...". Defence24 Sp. z o.o..
(29 May 2022). "Poland gives 18 howitzers to Ukraine – public radio". [[Reuters]].
(2 June 2022). "Poland to sell 60 Krab self-propelled howitzers to Ukraine".
. (18 October 2022). ["3 dywizjony Krabów na Ukrainie"](https://www.altair.com.pl/news/view?news_id=38254). *Altair Agencja Lotnicza*.
Głowacki, Bartosz. (14 August 2023). "Poland signs deals for light recon vehicles, heavy infantry combat vehicles and APCs". Breaking Media, Inc..
"Umowy na dostawy ciężkich BWP, nowych KTO i Lekkich Pojazdów Rozpoznawczych".
"Polish Armed Forces have received self-propelled howitzers KRAB".
(1 March 2024). "Key Deadlines for the Polish Army Krab Systems Procurement Unveiled".
(2025-07-10). "Zamówienie na dodatkowe Kraby dla wojska!".
Świerkowski, Adam. (2025-12-24). "Wojsko odbiera szkolnego Kraba".
(13 August 2024). "Krab grzmi w rejonie Kurska. Polska broń widoczna w Ukrainie".
(5 September 2022). "Kraby zamówione w Kielcach". Defence24 Sp. z o.o..
"The Contract for 152 CRABs for the Polish Army Has Been Approved". Defense Editions.
(23 December 2023). "Kolejne uzbrojenie dla #WojskoPolskie.". Ministerstwo Obrony Narodowej.
(2025-07-10). "HSW S.A. i HANWHA AEROSPACE podpisały umowę ma dostawy komponentów do podwozi Kraba".
. (11 June 2022). ["Poland sells arms to Ukraine in record deal"](https://www.pap.pl/en/news/news%2C1235794%2Cpoland-sells-arms-ukraine-record-deal.html).
(1 June 2022). "Polska sprzedała Kraby Ukrainie. Rekordowy kontrakt".
Palowski, Jakub. (17 June 2022). "Ukraina: Polskie Kraby zmieniły sytuację w Siewierodoniecku". Defence24 Sp. z o.o..
(13 September 2022). "Zakhidna bronetekhnika v nastupi na Kharkivshchyni".
Palowski, Jakub. (14 November 2022). "Kraby walczą Excaliburem". Defence24 Sp. z o.o..
"Attack On Europe: Documenting Ukrainian Equipment Losses During The 2022 Russian Invasion Of Ukraine".

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