As World War 2 entered its final stages the ever resourceful German units on the ground, starved of supplies, turned to using whatever was at hand - the results turning into unusual and unclassified one off examples.
 
In Bolt Action
Fast mobile weaponry such as this can make a real difference when it comes to securing an avenue of approach early in a battle. Particularly good on the flanks, move up to a good position early to hinder the enemy, or at least distract them from your real objectives.