Thanks guys, I apprciate all the comments. Also to answer some stuff about it:
It did originally have some colour. I had used dark red stripes down the body, but they took away from the sterile look I was going for.
The back, as seen in the picture, does have a hatch... the space holds three soldiers a gunner and a driver, or just the gunner and the driver and a stretcher.
Also, I can add a picture of minifigs with it, it just isn't the greatest quality.