Thanks for the update jualdeaux!! That little bit of play between upper and lower is normal for AR patterned rifles. That's why there's products out there like Accu-Wedge, that help to eliminate that play.
I ordered the red/black also that why I was asking how you liked the color. The pics you posted earlier in this thread (from CK FB, I believe.) are really sharp and look like a burnt red color. The last couple pics on their FB when they announced more rifles were shipping they almost look like a pink-red. Hoping it's just the lighting.
fbzero, hope you get your shipping notification soon. I ordered mine a few hours before the $999.99 pre-order pricing ended and received my notification a couple days ago. As I said, hoping you get yours soon.