WR-40 Langusta
WR-40 Langusta is a self-propelled artillery or multiple rocket launcher.
Overview
Polish variant of the BM-21 Grad multiple rocket launcher.
In detail
It is associated with Poland.
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“WR-40 Langusta”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q847136: WR-40 Langusta
Consult the source