The first person weapon view will randomly disappear. Main hud and icons not effected. Can only get it back by leaving and rejoining server. Or when server changes map. Makes it really hard to know, what weapon is in use when this happens. Not game breaking, but it is match breaking. No screen cuz nothing to see. literally. ?(
It’s a known bug, we are looking into fixing it.
I can only recall it happening once, but I’ve seen a similar thing where another player’s model was invisible, making them just a floating gun. It was kinda funny. 
That’s actually a Source engine bug which is present in Valve games too. We’ve seen this in CS:S, TF2, CS:GO. One of our programmers, Lucas, made a fix to the engine which resolved this in the vast majority of cases. We’re unsure what causes the remainder.
Seems like it happened to me today.
However, I need had this problem in any other source engine games.
Oh wow, really? I didn’t know that. Then again, BM is one of the only games I’ve ever really played much MP on, so…
Thank you. Is there a command I could bind to a key or just type in the console? To bring it back up in match. As a temp fix…
Unfortunately no, sorry. The only known fix is to leave and rejoin. It’s high up on our list of issues to fix, we hope to have it resolved soon.