The CG Boss Jack will make a great combat knife. .22 thick. Convex grind. Lots of handle, exposed tang, still plenty "stabby".
In asking for feedback from people with "combat" experience they all recommended no choil option for my cousin, who is a Marine. They recommended this based on not wanting anything to "hang up" when cutting netting, webbing in a hurry, often with gloved, or cold hands under stress.
He sure loved it when it showed up (thanks to the generosity of donors who pitched in on here!).
The Tank Buster will be a better chopper, but not necessarily a better "combat" knife. It is thicker, heavier, and less "stabby". So there are trade offs!
I would love to have either, but then again, I am not a soldier.
The Boss Jack will be lighter than the TankBuster, which means a lot when some one is already toting around up to 70 LBS of gear, and even a light, "jump out of the truck when we get there" set of gear is pushing 20-30 lbs by the time you add in rifle, mags, flack vest with trauma plates, helmet, goggles, gernades, water etc.
I just went with muddy/tan. As long as it is not a flashy cromed out affair, it shoudl not be an issue color wise. Now, over all length may be a factor as to what they are allowed to carry by rules.