In its most basic role, a CAAT platoon and its various sections and teams will engage armored vehicles (tanks, APCs, etc.) first with heavy machine guns, usually the M2 .50 caliber machine gun. This is to "button up" the vehicle, or have the vehicle operators close all the hatches in order to protect themselves from the incoming rounds. When the target is effectively buttoned up, the TOW missile operator will fire a TOW missile, which, upon impact, will cause a dramatic increase in pressure in the closed target vehicle (such as a tank), causing it to explode from the overpressure, eliminating the enemy.
The HMMWV used for this model is the brilliant one made by Dragon. Excellent model, really!
I had to put down a small piece of plastic into the vehicle to get the gunner figure into the correct position, to actually have his hands over the "butterfly" triggers of his good old reliable M2.
The figure got a quick paintjob in woodland camo. I really painted it from head to toe - after all the legs can be seen through the glass of the vehicle's windows.