There is no reason to hassle with the front sight since there are so many cheap replacements of all kinds.
Years ago when all we had was the A1 type ARs, and the front sight was where you made all your elevation changes, we found many were bent. As you change your elevation, you changed your windage, wheather you wanted to or not.
On our combat team A1's I took the front sights out and turned them down on a lathe, trueing them up and making them a bit thinner. Worked then, but not worth the effort now.
CPT USAR Ret
USAMU Sniper School Oct '78
Distinguished Rifle Badge 1071