Roger on the locktite, seen many sights with a red layer on the bottom. Hit it with a propane torch until the oil smokes on it and then give it a whack. I’d lose the brass drift too, they’ll still deform the normally soft steel in most front sights and leave brass marks that are hard to remove on stuff. I always fit sights to be tightly installed with a hard nylon punch and an 8oz ball peen. Used a cloth patch folded up under the tip of a steel punch to remove tough ones with much better results than brass.
