I don't think it would be fair to add full Kevlar into the server. The point is for SWAT to be "Over-powered" as such, that's how things are in real life, most of the time. However, I think it would be cool to add a form of bullet proof vest into the server, that isn't overpowered, and you're still damaged by bullets, just not as much. But Headshots/Leg shots still damage you. It's often the case that in real life, when people are shot with a shotgun while using a bullet-proof vest the obtain serious injury, such as damaging to the ribs.