As much as I would love to believe it being placebo, it literally never happened outside of your HUD. I have never used any custom weapon skins ever since I started playing TF2 (around 3 1/2 years now) and all my config does is changing network settings, crosshair options and mostly sound related things. The only thing that affects the viewmodel is the viewmodel changer that I have been using for around 3 years that only plays around with the r_drawviewmodel 1/0 command, minus that I have nothing customized. Although this bug did not happen all the time, it only started happening around the MYM update I believe.

I tested it with default HUD, improved default HUD, e.v.e. HUD, OW HUD and m0re HUD. None of these have these issues besides your HUD for me.

Apparently a bug, a while after freshly installing rayshud (via installer) some weapon models seem to completely disappear or seem to have a different color scheme (the latter seems to be rare) after starting the game again. I could not find out why, I only know that it happened like over 10 times in like a month now.

Example of missing rocket launchers (in third person, first person and also on different players
http://images.akamai.steamusercontent.com/ugc/436111076095639417/F124F4E4ED22DDAAD73DAE89B6C7F28F4ED9B0E9/ - loadout screen
http://images.akamai.steamusercontent.com/ugc/436111076095641165/F97FE6DB9E0E17701F9DE3D0884E46F05C571B28/ - first person, normal viewmodel
http://images.akamai.steamusercontent.com/ugc/436111076095642808/E986826706B99A6506A4D1F9D0E8CBC76C53FCFA/ - first person, min viewmodel
http://images.akamai.steamusercontent.com/ugc/436111076095644707/FC9DC707162D4BCB8F1069C66DBA1F4822717BBD/ - world player models not having rocket launchers either (other classes do)

A fresh install fixes it, but it comes back after a while. Does not happen with the default HUD nor other HUDs from my experience.

UPDATE: Neither a fresh install of the hud nor a fresh installer does the job anymore. Rip.

Greetings rays, I would like to adress a problem I keep on having with your HUD, despite all the updates.
Since around Halloween 2015, when I decide to add a custom crosshair, I keep on getting another konrwings
crosshair despite I never clicked on it.

http://images.akamai.steamusercontent.com/ugc/577949604263950484/19280027973D47F9B742264A02342DC434279E22/

Since I have next to no idea with editing huds / bugs myself, I would need some help on this topic as I would love to use the outlined crosshair wings for bright maps to locate my crosshair easier (for example when playing sniper on process trying to headshot someone midair)