[Unclenick]

I think maybe what Recoiljunky did was get the slide stop out then just drive the barrel and slide forward off the frame as a unit. That doesn't require unlocking. It would mean scraping one side of the link lug channel between the front ends of the frame rails with the slipped link lug pin, but it would work. I've disassembled a working gun that way before without even taking the recoil spring out. The spring guide just bears against the top front edge of the the link lugs when you do it, though you have to be careful it doesn't let go and fly across the room because the recoil spring is still compressed.

But also, the OP's gun isn't stuck. He says if he taps on the barrel muzzle it releases the stuck slide forward. That's what made me think of the peened up rail ends.