Everyone has a shield in IB.. so no they would not ever one shot you no matter what their level was or what weapon they have. That sheild has the same damage reistance no matter what level a person is. And weapons that do more than full shield do not always penetrate to do that remaining damage to the player. So does not matter if you doo 9999999999999999999999999999999999999999999999999999999999999999999 damage a shot. It would still take two to kill somoene.. one for the sheild and one for them. IB was not ever about being a god and being invinclbe and not being able to be hurt at all by lower players jsut because of gear and weapons.