Mine arrived and first thing I did was check all the head spacing, alignment (bolt, gas tube, etc.) and torquing. Mine was perfect, the only exception was the handguard was rolling around in the box and one of the M-LOK bolts was stuck in the handguard for a bit. I've heard some of these have "not up to snuff" QC; I know 2 ppl other than myself who ordered one. Mine and another friend's were fine, the 2nd friend had scratches all over the top rail. Cosmetic, but it's not being marketed as a "blem" so - don't send a blem. TL;DR: Potential for a good deal. I'm happy with mine, but some a sample size of folks are getting blems/lemons.