These are nice, though what the deal is with the balled fist with both is a mystery to me. The black tanker is most welcome as a great change of pace. They'd look great in a Bradley as well.

Does anyone know what kind of shoes/boots are they wearing?

Tanker boots. "Forge the thunderbolt " "armor rules " and all that. I bought mine just before graduation from 19E AIT. Had them for nearly 30 years. Got them resoled. I wore out those soles and by then they were just too far gone. Lots of memories in a pair of boots.