Ykerol 1/72nd scale WWII Soviet troops. The whole set is prone, part of their series of prone figures. This guy has a map with him. He would be ideal as an artillery observer, engineer or even an officer or scout on a recon mission.
Laying in wait with a grenade. This guy would go well with the rifleman to man an outpost.
Another rifle armed soldier. These guys would look good lined up along a tree line or in shallow trenches.