Multi tools are issued so no need to buy one. I still have half a dozen various issue multi tools laying around. Hard to sharpen steels will be a no go if you're a grunt, go for the toughest you can get. You are going to break your folder, so get a tough one and take a few. Fixed blades need to be as dumb as they get with a strong steel that you can sharpen on a rock and straighten the edge on a M2 barrel with. When you need ammo and the ammo is in crates on top of the ICV it's quicker to pop the metal by prying than twisting it open with a multi tool, and you will do that plenty unless you are chow hall guard or a water purification specialist. My fixed blade mostly opened crates of ammo fast, cut a bunch of watermelons, killed a goat so we could eat it and a bunch of mundane tasks. I tried a SOG seal pup for a couple weeks but that thing had steel like an aluminum blade and was even the Seki blade. So the Glock knife went back on and the seal pup was given to a mechanic who would never need to use it.