Even after the 1.01 patch the weathered 10mm pistol is still missing the meshes after performing any of the 3 weapon modifications available, either the extended magazine silencer or laser sight. The gun will vanish after exiting the pip boy and is replaced with a giant red diamond with a white exclaimation point in the center that surrounds the avatar.

How such a giant error could have been missed before the game`s release or omitted from the scripting of the patch is beyond me.

I had the same thing happen, but I just sold it, was annoying being inside the red diamond. lol Gotta laugh I guess, what can you expect from Bethesda anymore. I think they make this stuff up and laugh about it in darkened cigar smoke filled offices deep within the bowels of hell at Bethesda Headquarters.