This is the main issue I have with Sig currently. I won't buy a Sig unless in person, simply because I don't trust their QC and want to give it the once over. It's s shame, but I also had this issue with Glock in the past. I had 2 G19, that had barrel crowns cut off horribly. So for a while, I wouldn't buy a glock sight unseen.
It's doesn't deter me from purchasing, but doesn't instill confidence in their abilities.
TXPO