Hello everyone. I just recently ran into a very odd bug, and I can't seem to figure out how to fix it myself. This bug has actually happened with quite a few weapons, and I originally ran into this bug a while ago, but I am just now deciding to post about it for help now. The bug makes the hand look like it is stretched across the entire screen. Everything works perfectly, damage, animations, its all normal, its just that the only thing is the weird hand stretch. If anyone has any possible solutions, it would be greatly appreciated to post the answer, thank you all.

Which weapons shader are you using?
This looks like a weighting problem with the verticies in your rig.

Yup, from what i can see that's not a bug with GameGuru, that looks as Myke said as if the model hasn't had its skin wights set properly, or may have non-zeroed bones.

There's a small piece of software (i can't remember where it came from now) called Mender, if you run the model through that it should fix the non-zeroed bone issue, and for the skin wight issue loading and saving it via the DirctX9 MeshView program can in most cases fix that (i've attached meshview to this post for you).

I usually run any model with bones through both programs before importing into gameguru just in case, seems o work most of the time.

EDIT: you can download Mender from here: https://forum.game-guru.com/thread/210022