I voted 511. I have never served but I do wear a tac vest and gear much the same. I don't want any more weight than I have to for a knife that will be carried a lot and used seldom. Yes the handle is too small for me as well but that makes it take up less room and it gets in the way less. That is the reason why I personally carry a Yadkeeper Combat Grade. I have a friend who went to Iraq and a mutual friend gave him a YardHook I think. He said it stayed in his ruck attached to the personnel carrier for his whole tour. Too heavy for daily carry and he is a big guy.

I emailed a friend's son from the 10th Mountain (I think I remembered that right) in Afghanistan and he advised that most of his unit carry knives in the 4-light and thin 6 inch range. FYI