I had this bug once a couple weeks ago, and didn't bother posting anything about it. Today I got it again, so I decided to have a look if someone else has experienced it.
I was playing a normal R/S match in militia using my basic arsenal of an mp5 and a law. After I died the first time, I respawned with the same weapons but with some major bugs: Mp5 had 193 bullets in it's magazine and didn't shoot visual bullets (as in no mp5-bullet images). I tried reloading but it didn't do anything. Law had no changes so I decided to use it since mp5 was bugged. When I fired, I exploded myself (like firing explosives with the knife or chainsaw when modding). I tested it many times, and each time the same result. This bug didn't go away when the map changed or when I threw away the gun.
This is rare enough not to be a threat or anything, I was just curious. I can post a screenshot showing the mp5.