This set from The Plastic Soldier Company covering the Soviet war effort in WW2.
The box contains 26 x 28mm hard plastic miniatures and 8 models depicting WW2 Russian infantry heavy weapons as follows:
2 x maxim teams firing
2 x maxim teams moving
2 x 50mm mortar teams
2 x 82mm mortar teams
2 x firing PTRS anti tank rifles
2 x moving PTRS anti tank rifles
More to follow ...