Windage Sight Adjustment Mark III*

I am having difficulty adjusting the front sight on my Lithgow Mark III*. The POI is about 1.5" to 2" too far to the left. I know to move the front sight to the left if I want the POI to move to the right. Isn't that correct? However I am having difficulty making that happen.

First, I used a brass punch & a light "gunsmith" hammer to move the front sight. I positioned the punch at the base of the sight. I hit it lightly at first, but when the POI did not improve, I hit it harder. Still no movement of the POI. I then used a heavier "pointed" hammer. I still did not get results even after hitting it harder and harder. Being concerned that I would mar the metal I covered the front sight with a T-shirt rag & hit it even harder. Still, no results.

Do you have suggestions? I am hitting the horizontal protrusion on the side of the sight, sometimes lower than that, not the top of the blade. Any help will be appreciated.

Another thing to note is that sometimes the front sight blade is peened into the front sight base to prevent any movement. This will have to be dealt with as well. I have had front sight blades so deeply peened that they had to be replaced.

Many parts were peened in place during military service. British armourers manuals actually show what parts were to be locked into place. If you basically have a round divot somewhere on the base of the sight blade itself then it was peened. I'll see if I can get a picture of it for better illustration. As for buying the sight adjusting tool, here's one from Numrich: http://www.gunpartscorp.com/ad/255950.htm  Also check on e-bay, there used to be a guy that was making them and selling them there. For penetrating oil, Kroil is good stuff. Definitely give that front sight a bit of oil and let it sit a bit. It be all it takes to get some movement going.