Quote Originally Posted by wareagle700 View Post
Try removing it with vice grips.
Put one jaw on the rear of the roll pin and one jaw on the edge of the piece that has the roll pin hole. Gradually tighten the vise grips using the screw on the handle until it starts to squeeze the roll pin through.
I take some pics but I am about to head out. Good luck
Bad idea. Colt rifles are known to have an extreme allergy to vise grips....

No advice is better than bad advice. We have removed hundreds and hundreds of side mount sling swivels. It is never easy. The only sure way to get them removed/installed without damaging your rifle is with the right tools. There are tools that solve problems and tools that create problems. Vise Grips fall into the later category.

If you have the proper tools, it may be quicker and easier to remove your muzzle device and slide the sling mount off while removing your front sight base.

-Mark