a3 front sight post

[ssgross]

Yahtzee that was easy! Got the pin started moving right to left with a 1/32 nail set and a very big hammer. I supported the sight with wood door shims to protect it. When I switched to a regular punch, it wouldn't budge. Tried hundreds of small taps - tried to let the vibrations work some more kroil around it. punch started to bend.
Hmmm. I took a small hand torch and lightly touched around the the pin for a few seconds - just a bit of warmth - I could still touch it without burning my finger. punch snapped midway up the tip...but the shortened punch then started to move the pin right out!
Muzzle against a carpet on the concrete floor, and a piece of hardwood dowel behind it. The sight collar started to move after a few blows.

Now the diagnosis...nothing wrong with the key (key came out after scrubbing with kroil and pulling with needle nose). Either the keyway was cut wrong, or the witness mark on the barrel was off, or both - this barrel was over timed quite a bit. I used a hex wrench to make sure my level was on the flat of the milled part.
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