Ever wanted to make a gun look a little more different, or remove/move the scope on the rifle, or even make a sniper look like a shotgun?
this bug I found lets you switch the weapon models around, and appears to persist provided you don't change your loadout

just found this out, it's a way to switch weapon models, such as making a sniper rifle use your normal rifle model, or an LMG use an AK model, etc.

steps to do this:

1. select the gun you want to reskin
2. die somehow
3. click the weapon you want to change the model to (the skin you want has to already be selected)
4. don't confirm or press cancel, press escape until the menu pops up, then back out and just press spawn
5. in theory (at least when I tested it) the weapon you first picked will now have the model of the second weapon you picked, such as having a sniper rifle use a normal rifle skin (letting you bypass the un-deletable blocks in the scope and barrel) or having a rifle use an LMG model (since the LMG can make irons that line up with your crosshair)
seems easy to replicate, makes me happy because I managed to make a DMR I made for the rifle with a scope actually use the scope as a sniper

this should open up many opportunities for new weapon skin usage, although I will note some model changes can cause blocks to be snipped off, like when I changed my rifle to look like my sniper, it cut off the top layer of the scope and the bottom layer of the stock

let me know if you guys can replicate this, but it's pretty cool!