The crossbow isn't bad because it isn't instakill, but the ballistic knife looks even easier to use than the throwing knife, and isn't ballistic knife instakill? If not than yeah, it would be perfectly fair. It's just strange how in Call of Duty 1, 2, and 3, they had all realistic WW2 weapons. Cod4 I don't remember much about it, but they had all realistic weapons, right? Cod5 I also don't remember, they had laser guns and stuff, but they didn't have that in the actually main game, just the zombies. MW2 had the throwing knife, which wasn't bad because people rarely got kills with it unless they were practiced.