A little Kroils, and a punch and hammer, and driving them the right direction first (left to right) makes it an easy proposition. If you have beat the **** out of them from the wrong direction, then it will be harder, to say the least.I have a question regarding a AR-15 rifle. I am trying to install a new quad rail. In doing so the front site post must be removed, but I can not drive out the two tappered pins that lock it onto the barrel. I have ben hammering on them to no avail. I realize they must br driven out from the small end, but still no result. Stuck like a mother! Anyone have a clue why these bastads won't budge?