[Imp]

To my knowledge thats pretty much it a molotov or more likely Napalm derivative chucker, like a 60m mortar but fires hollow glass balls containing something volatile. Considering Russias knack for flame weapons probably chemicals that ignite on contact with air or upon mixing. I would not like to be anywhere near it when it fires unless ammo quality control was damn good. Probably a stopgap measure while Russia rebuilt its industry using glass manufactures for ammo. They lost their best glass works in the initial push which is partly why Russian fire control is no good, poor optics.