-Mag well would take about 50% of my mags, some metal, some polymer, but not necessarily two of the same brand. Badly machined corners and what looked like a glob of Cerakote. I introduced it to Mr. Dremel.
-Gas tube hole undersized. Had to be drilled out
-Bolt catch pin hole undersized. Had to turn down the pin to get it to fit
-Buffer retainer hole undersized. Currently running it without the retainer.
The comments about the SLR being "NEA" quality, aren't fair to NEA. I've had 4 NEA ARs over the years and none of them had the spec issues of the SLR.
"MDI" should replace NEA as the go-to for describing bad quality control.