There are three different types of mortars in Bolt Action: the light, the medium and the heavy mortars. The light mortars are team weapons of two men, the medium of three and the heavy of four. If mortars are not inexperienced then they can have a spotter. Sometimes mortars can be game changers, especially the heavy ones. During world war two, Stalin called artillery and mortars the "Gods of War"!
I bought all three Soviet mortar models of the Warlord Games, the 50mm light mortar, the 82mm medium mortar and the 120mm heavy mortar.