Great job on it. I like the weayhering and overall look of it. One issue though, you have both rear lights with a red lense on them. In actuality, only the upper left oval is red. The lower left anf both upper and lower on the right should be dark (black) slits. They are part of the blackout marker and stop light system.
They are still this way on modern M113A3s.

The figure looks really great too. A minor tweak on the lights and it will look even better.