This paper presents the development, testing and evaluation of a new unguided rocket equipped with a thermobaric warhead. The aim of the research was to design the ammunition to be integrated with an existing multiple launch rocket system. This condition introduced limitations of dimensions, mass and mass distribution. The experimental work consisted also in optimisation of the thermobaric composition and configuration. The resulting ammunition was tested for determination of effective range and precision. The destructive effect was evaluated by live firing against non-armoured vehicles and masonry light structures.