Put mine in last week, everything fit well. I had issues with the lower being out of spec though, I confirmed this by installing the parts into a Norinco lower and it functioning flawlessly. Now they're all installed and working well.
The TNA LPK is nicer than the Norinco ones by a large amount too. Very happy with mine. Just waiting for the DPMS uppers to be in stock so I can build the rest of the rifle.