This is a M8 Greyhound scout car (photo credit here). I like this vehicle a lot - it was very quiet and could sneak up on an enemy easily. The 37mm main gun could destory a Pz 3 for sure and a Pz 4 if lucky. Serious damage could be done to a heavy German tank if attacking the rear. Also the Greyhound carried canister shell which is like a huge shotgun shell for infantry supression. This one looks like it has an anti-aircraft mount as well.