Did you realize all weapons have under Display/LODBias 10 instead of 1!
This is probably the solution for clippy meshes - wich are caused by the
simplify mesh function. Also many weapons look way better - take for
example the BUF railgun - it looked crappy simply because the texture
was 128 instead of 256 - or the FinalWorlds minigun which had almost
no sound - all improved and entirely optimized.