Originally Posted by Jpyle
Not to be a smart ass but you do know that the pins are tapered and only come out from one side. Flipping the upper doesn't work. Did read here recently that someone had to press the pins out and that it required like 50 tons of force to get them out, believe it was a Del-ton upper.
This was my unfortunate tale. Had a machinist who bent a punch, milled a block to hold the post, milled a new, stronger punch, then finally put it in a 50 ton press with a hardened steel t block across the pins
My upper was assembled by DTI, and I believe Troy said his DTI upper came without any pins at all, so in the future I think set screws may be the way to go...