as I haven't tested it on all weapons.
The first two are obvious, the third pic you need to look for the white spot on the uniform. This is the 9mm "Maria" from off Benny.
http://i1218.photobucket.com/albums/dd413/HarnessedYeti/ScreenShot19.jpg
http://i1218.photobucket.com/albums/dd413/HarnessedYeti/ScreenShot4.jpg
http://i1218.photobucket.com/albums/dd413/HarnessedYeti/ScreenShot16.jpg
As I stated above whats happening is the weapons are clipping to the inside of your char. Looks dumb.
Obsidian......please fix.