silencer bug

i’ve had garrys mod for several months. the other day i attached a silencer to a usp and fired. the gun made the silenced sound, but the silencer disappeared. i tried it with several other pistols(kermites), to the same end. has anyone else had this problem, and if so, how do you fix it?

any help would be appreciated.

[editline]04:53PM[/editline]

oh, and my computer is a hp laptop with amd athlonx2 64 2.00ghz, and the only addon installed at the time was mad cows sweps, which has never given me any problems.

try re-installing and/or re-mounting CSS

didn’t work