Not sure if you are planning on shooting service rifle or Match rifle. If SR, then you will need the standard A2 front sight and the detachable carry handle with sight. There are many makes and varying qualities, but an entry level DPMS will run you about $100. If you are shooting a gas block, you will want to replace it with a standard front height. (beware there are different sight heights for carbines and rifles)
If you are shooting match rifle, you can upgrade to better aperature sights such as Warner, Centra, Phoenix Precision, etc. you can also change out the front sight to something like MCS, ANS, Stallings Machine, etc. these will give you adjustable front and rear iris and precision windage and elevation adjustments.
Service rifle is like stock cars, match rifle is like formula one! (Service rifle rules inmy opinion)
Last edited by oryx; May 2, 2013 at 03:56 PM.