It seems what whenever I am in an outdoor area, or any area receiving light from outdoors, I get a weird glitch that makes my gun look as though the model for it is not loading properly and its absorbing surrounding textures onto it. I've included screen-shots showing this glitch.

I run the game on Ultra at 40-70 FPS with a single GTX 570 at the moment in DX9 mode with High res textures enabled. Drivers are up to date

Screens: http://cl.ly/8jdg and http://cl.ly/8ksQ

Not sure if this glitch is a known issue or if there is any fix.

nice camo i must say