Originally Posted by Sawstink
I wouldn't extend the barrel of an M16 seeing as they are already quite long. Lasers are also useless IMO. Also be ware that certain lasers are not allowed at public games, as some are powerful enough to do some damage with a quick pass over the eye.
Personally I would suggest an M4 for that reason that you have the ability to use it for the field and CQB(I love to be versitile).