Gmod Gun Glitch

So whenever i try to play a certain server that has halo 3 guns add on whenever i hold a gun there is my actual gun, then there is this second gun that just sits there and does nothing at the same time and it is annoying, really buggy looking and it blocks my scope whenever i try to zoom in. I have unsubscribed from the mod and have resubscribed it and it didnt fix it and it only happens on one server. Please try to find some way to help as this bug is really annoying.

Here are some screenshots of the bug. The screenshots are kind of dark but you can still see the extra fingers and the gun models going into each other.

Contact the addon developer about it.