>would having contrasting marker like the white writing on the black gun help align things up in video post processing? A way of tracking in an editor?
Yes. This explains the [stupid] white writing on the guns. The triple crosshatch on the top of the red-dot would make a perfect registration mark to know where the gun is. It would make the software for doing a VR simulation like this extremely efficient and foolproof in comparison with any other method.
This theory was posted last night.