You recommended PSA Uppers. Are you familiar with their QA/QC? Do you realize they don't manufacturer barrels? Did you know they sell barrels FN has deemed as seconds? Seems like a lot of cracks. No everyone who doesn't check headspacing isn't wrong. But if you buy from DD/Colt/BCM et al. you at least know it was checked a couple times before it left the factory.
Yea, like I said, my upper parts have been Daniel Defense. I like them. I linked to Palmetto State because I know a lot of people who've built off their stuff and never heard one issue, so it was a convenient site to link to price comparisons. I've heard nothing but good things about FN's barrels but have never heard anything about PSA using "seconds" though.
Wow, talk about overkill. Do you also pull bullets on every cartridge they buy to check for double charges or proper powder loads? It's called calculated risks, and buying reputable products.Yes. It is dangerous and could be out of spec.