Rodent 6 seems like a good all arounder--looks like it could function well as a fighter if needed (that top quillion is designed for that--but it's a decent enough blade for everything he'd need. Put it in a Spec Ops sheath with a multitool and he's good. But like MB noted, need to check what his unit will allow.
Take it with a grain of salt, considering I've never served in the military or in a war zone. Maybe some day, and if that day comes, I'd prefer the Rodent 6 <img src="/ubbthreads/images/graemlins/laugh.gif" alt="" />