WR-40 Langusta

{{Infobox weapon

| name = WR-40 Langusta

| image = WR-40 Langusta, MSPO 2007.JPG

| image_size = 300

| caption = WR-40 prototype

| origin = {{flag|Poland}}

| type = Self-propelled multiple rocket launcher

| is_ranged = yes

| is_artillery = yes

| is_vehicle = yes

| service =

| used_by = Wojska Lądowe

| wars =

| designer =

| design_date = 2006

| manufacturer = Huta Stalowa Wola

| unit_cost =

| production_date =

| number =

| variants =

| spec_label =

| weight = {{convert|17000|kg|lb|0}}

| length = {{convert|8.58|m|ftin|abbr=on}}

| part_length =

| width = {{convert|2.54|m|ftin|abbr=on}}

| height = {{convert|2.74|m|ft|abbr=on|sigfig=1}}

| diameter =

| crew = 4

| cartridge =

| caliber = 122.4 mm (4.8 in)

| barrels = 40

| action =

| rate =

| velocity =

| range =

| max_range = ≥42 km {{cite web|url= https://www.mesko.com.pl/en/product/122-mm-m-21-fhd-feniks-rocket|title= 122 mm M-21 FHD "FENIKS" rocket - MESKO}}

| feed =

| sights =

| breech =

| recoil =

| carriage =

| elevation =

| traverse =

| armour = Steel

| primary_armament =

| secondary_armament =

| engine = Iveco Aifo Cursor 8 EURO 3

| engine_power = {{convert|259|kW|hp|abbr=on}}

| transmission =

| payload_capacity =

| fuel_capacity =

| pw_ratio =

| suspension = 6x6 wheeled

| clearance =

| vehicle_range = {{convert|650|km|mi|abbr=on}}

| speed = 85 km/h (53 mph)

| guidance =

}}

WR-40 Langusta (English: crawfish) is a Polish self-propelled multiple rocket launcher developed by Huta Stalowa Wola. The first 32 units of the WR-40 entered service in 2010.

The Langusta is based on a deeply modernized and reworked Soviet Cold War-era BM-21 launcher. The old petrol Ural-375D truck chassis was replaced with a modern one, and the launcher was fitted with a fire control system.{{cite magazine |last=Kiński |first=Andrzej |date=2007 |title=Pierwsza Langusta przekazana |trans-title= |url= |language= pl|magazine=Nowa Technika Wojskowa|issue=4/2007 |pages=16–20 |location=Warsaw |publisher= Magnum-X}} The carrier used is Polish 6x6 Jelcz truck model P662D.35 with low-profile armoured cabin for the whole crew.[http://www.altair.com.pl/cz-art-328 Grzegorz Hołdanowicz, Feta z Langustą, RAPORT-wto 04/2007] {{Webarchive|url=https://web.archive.org/web/20090302171034/http://www.altair.com.pl/cz-art-328 |date=2009-03-02 }} (Polish) Also new ammunition, {{Ill|Feniks-Z|lt=Feniks|qid=Q113126026|short=yes}}, with a {{Convert|42|km|abbr=on}} range was adopted.

The prototype was made in 2006 and given to the army in 2007, after successful trials. A series modernization of 75 vehicles followed.

Another step in the modernization of Polish rocket artillery is project 'Homar', corresponding to HIMARS rocket system, carried on from 2007.