Interesting. I'll have to take a look at mine.
kwg
Please do, I'm interested to hear how yours fits. On the two I've had, and both of my bud's, you can see the misalignment on the outside too; the lower doesn't match up with the upper at the rear and it's worse on one side.
When a company keeps insisting "we've never seen that before", I can't help but wonder if it's just me somehow, but I'm seeing it on 4 different lowers of theirs and at least 8 uppers that all fit mil-spec lowers correctly.
I think it's their design flaw, because the rear lug pocket is measurably off to one side in the lower, by about the amount you see in the pic above. That just seems really weird to me, given how common and consistent most other AR15 mil spec receivers are that fit each other correctly.
