I've just bought the 10mm pistol clip extension modification , and put it in my Weathered 10mm Pistol (the one from one from the pre-order DLC's)

This is the result....

(First 3 are the actual images of what the problem is, the 4th is the image of the item equipped, and it's info)

http://www.mediafire.com/imageview.php?quickkey=75rv0rhs5q8ezfo
http://www.mediafire.com/imageview.php?quickkey=3cwarl3bz5dclsa
http://www.mediafire.com/imageview.php?quickkey=o1dcbyqy0bycooz
http://www.mediafire.com/imageview.php?quickkey=9i9oe0kef9am651

Massive red box, with a white Exclamation mark down the middle, all around my character. Makes it impossible to see anything in first person view

looks like what most beth games do when there is no mesh to display for a given item.

Yeah, they forgot to include the mod meshes. Either don't mod that particular weapon (specifically the weathered version), or use this mod as a fix: http://www.newvegasnexus.com/downloads/file.php?id=34794

Awesome Will try this mod out in a moment

never really modded fallout games - have played all of them. downloaded the fix put mod where instructed to place in folders - still not fixed. what do I have to remove to make the mod work? I'm guessing it's the dlc .esp file for the 10mm and vault 13 armor. hope I'm right, going to try it in a minute.