Installing Front Sight

[jbkf1003]

I have an M1 Carbine with a Criterion Barrel. I needed to remove the barrel band and chop the Bayo Lug since I live in PRNY. Don't worry it's new production, I have the Matrix Precision tools. I got the pin out and sight off but it was a bear, super tight. I chopped the lug off and now I am putting the sight back on, but it's still very tight. I have it about 1/2 way on the key and it's not moving any more with the mallet on the install tool. I am thinking about backing it off again, lubing the barrel with anit-seize grease, and heating the sight with a torch before trying again. Any problem heating the sight up? Or any other suggestions / tricks you guys have?

Thanks
Justin