I have taken of a couple front sights, they can be a bear. What I did is take a small cheep styrofoam ice chest and cut a hole in the side 3 inches off the floor just big enough to get the barrel into. Stuck the barrel in about 8 inches and froze it overnight with some dry ice. The next morning I chucked it up in a vice and hit the front sight with some heat form a torch and 2 taps with a hammer and a block of hard wood the sight popped right off.
Nevada, The last free place in this country.