The intention of producing a fresh variety of heavy-duty SOS rocket launchers was written [in February of last year](https://defence24.pl/industry/Russians-with-new-launcher-rocket-thermobarics). It was then speculated that the fresh chassis for the TOS-3 would be the T-80 tank, whose production the Russians want to restart. [A fewer months later it turned out to be, however,](https://defence24.pl/industrial/Russians-presenting-new-artilleries-thermobaric) that it is most likely the T-90 tank hull, which is presently the only vehicle produced from scratch in Russia (in the T-90M variant).