I sit corrected on the M-4's big gun. You are so correct. I used to read "G.I. Combat" as a kid and still like that little M-3 Stuart. ...Your Dad is an American Hero and a classic example of The Greatest Generation. My Dad and all my Uncles served in WWII as well. For many years after the war whenever there was a family gathering the stories flowed. God Bless Them All and Never Forget! Thanks.