« on: March 14, 2011, 07:05:54 PM »
They're the same gun, and as for the front sight there is no way to remove it. You would need to get a new outer barrel to add a flip up sight.
One thing I might note is that the switches are not set up like the M4. Instead of having the little notch facing away from the option (i.e. FIRE -O SAFE = fire)