The Polonez is a Belarusian 300 mm rocket artillery system of a launcher unit comprising 8 rockets packaged in two four-rocket pods mounted on a MZKT-7930 vehicle. In 2018, it was exported to Azerbaijan. The system was designed by the Belarusian Plant of Precision Electromechanics in cooperation with a foreign country, probably China. The first combat missile launches were carried out in China. The 77th Separate Rocket Artillery Battalion of the 336th Rocket Artillery Brigade of the Belarusian Ground Forces is equipped with it. An upgraded version called Polonez-M passed all trials and has been accepted into service by the Belarusian Ground Forces as of May 2019. Polonez-M has an increased range of 290 km (186.4 mi), a higher share of domestic components and can fire the improved A-300 missile.