As many of you know, the weapon called "Arbiter" is glitched. By this i mean when you equip it, whatever Gani you perform it will stay like that on other peoples screen, for example moving whilst in "dance3" gani.
To show what i mean here is a video, you can also do it with the 2013 christmas sleigh, which should be patched as people would think you are hacking and also just bugs out on PC as you become invisible:

 

I fixed it until some idiot reset the weapons and unfixed it. Its actually quite an easy fix tho