Its real easy to remove, unless your muzzlebrake is permanantly attached, then you may have to cut it off. If the brake screws on, then all you have to do is take the brake off and knock the pins out of the sight and slide it off the barrel. the gas tube will come off with the front sight requiring you to knock the pin out of that also.
Id go to ar15.com...they probably have a sticky on how to remove the sight on there and with pics.
Good luck
