Sure. Open the /scripts/command folder. Look for m4a1.script and sniper.script, open with notepad, look for any lines with "changePrototype", and place two slashes in the beginning of each line you find (the line has to start with 2 forward slashes).
This will break the sniper magnifier glass for some reason (the sniper can still shoot, though), but the rest seems to work just fine. And is much more fun.