When tool is equipped, localplayer disappears?

I'm working on a project involving guns and zombies (basically a zombie shooter game). Everything has been going pretty smoothly up until this point. My friend and I are almost done scripting a functional gun, but there are two errors that we must sort out before it's completed. The problem is, in a local server with other people present, those who equip the gun, disappear. I've also noticed that when a while the zombies usually go towards a player as scripted to do so, when the gun is equipped, they turn in the opposite direction (I'm assuming they go towards where the handle would be). My friend and I are totally clueless as to why this happens. We assume this may be too hard for most people to fix, but any help would be greatly appreciated!!!

There's not enough information to pinpoint the problem, but from what I read, it's most likely that a part in your gun is anchored. To fix this, simply unanchor all of the parts inside your gun.