M4A1 TO M4A1 SOPMOD
MODEL CHANGING
Gun you want to change:m4a1
Gun you want it to change to:m4a1 sopmod
Texture (If you want a custom texture on it): want it to look and sound just like the sopmod
Changing the texture and sound requires you to simply rename a few files.
Model changing isn't possible without a bypass, however. If you still want a camo supressor, you can just rename the texture and attach a suppressor to the M4.
PM for further help if needed.