OVERVIEW: The WR-40 Langusta is a Polish-modified 122mm unguided high-explosive artillery rocket designed for saturation fire against area targets. It is launched from the WR-40 Langusta multiple rocket launcher system, an upgraded version of the Soviet BM-21 Grad.

DETAILS: Developed by Poland’s Military Institute of Armament Technology, the WR-40 rocket maintains the 122 mm caliber of the BM-21 Grad but incorporates modernized components and improved ballistic performance. It uses a solid-propellant motor, spin stabilization, and a HE fragmentation warhead weighing approximately 18–21 kg, capable of engaging personnel, light vehicles, and soft targets. Maximum range is extended to 42 km with newer versions, depending on propellant and warhead configuration. The warhead detonates via point-detonating or proximity fuze depending on mission profile.

The WR-40 Langusta platform features a new fire control system, GPS navigation, and automated targeting. Rockets are stored in 40-round launch packs mounted on a Jelcz 6×6 chassis.

Rockets are fired in ripple or single-shot mode, controlled via a digital fire control panel. Targeting data is entered manually or transmitted from command posts, allowing rapid response and coordinated battery-level operations.

NOTE:
IOC: 2010
Operators: Poland
Platforms: WR-40 Langusta (Jelcz P662D.35 6×6 chassis)
Conflict used in: Not confirmed in combat

SOURCE:
Polish Armaments Group (PGZ): https://en.pgzsa.pl ; Military Institute of Armament Technology (WITU) ; Jane’s Land Warfare Platforms: Artillery & Air Defence ; Polish Ministry of National Defence ; SIPRI Arms Transfers Database