There is a bit of an inconsistency with the way weapons are held which may be best explained with screenshots:

I see, the first person view is indeed different. Not a high priority, but we'll have to fix this.

This isn't a bug, it was done with intention. If it's offputting, we can consider changing it, but it is low priority.

Well, inconsistencies can still be considered bugs, and it is indeed a little offputting - vanilla does a good job of showing the weapon without making it obscure much of the view.
Understandably a low priority issue, I appreciate the consideration!