What Trinimon said. They are a tad on the snug side and may take a bit more than a tap.If you don't own a sight pusher, loosen the two screws on the sight, and use a brass punch to drift it.
What Trinimon said. They are a tad on the snug side and may take a bit more than a tap.
http://na.henkel-adhesives.com/industrial/product-search-1554.htm?nodeid=8797940809729
Get some of this, not for the oil but for the freezing effect. We use it at work for various applications. Shoot it on the sight, this will shock cool it, causing it to contract in size. That should make it loose enough to remove.