I received my Blem upper yesterday. And other than the protruding weld dimple I filed down on the FH, I didn't see any Blems. And I don't know if it was mentioned, but the FH on these are A2's (closed bottom). I swapped out the PG & HG's with some that were a little more shiny than what came with the gun.
I mated this to an H&R A2 lower & took it out to shoot today. It ran 100% with Igman 55 gr. I was using 10 yard targets that zero for 50/200. You aim at the black dot, and your impact should be the grey dot. Other than needing 2 clicks to the right (it may need more adj. at 50 yds.), it was pretty much zero'd.
As a lefty, my biggest worry was going to be brass to the face without a shell deflector. I don't know if it was the ejector/extractor springs used in the bolt, or the ammo, but I had no brass issues at all.
It's amazing how light this gun is. This is a winner from H&R (PSA).