Vanguard Guns won't damage NPCs?

I'm making a defense game where you need to defend against attacking NPCs, and I cannot make it so that the NPCs get damaged by the Vanguard guns! I've also tried Murnau guns, but those do not work either. The NPCs have humanoids in them, too. I've tried very simple NPCs with only a humanoid and some parts, and complex ones with tons of scripts, and none of them work. Is this a problem with the guns or their scripts? If so, please help me

This answer is as simple as it gets. While it may not answer your question, its safe to say no one on scripting helpers is an expert with Vanguard or Murnau.

You can make your own guns, and that would be the most simple solution. If you need help along the way, you can post questions about that aswell.