I'm not so sure about the "good-to-go" part. I have ordered around 6 barrels from them, I still have 1. I had a 16" barrel that measured under 16", one 14.5" that measured 13.7" I had a SBR registrared lower at the time, but that could have really gotten someone in trouble with the law... I think I one point at least they did not appear to be aware that you do measure AR barrels from end of barrel to end of barrel extension. I was also told over the phone by the owner they use the gas port size on every barrel, every length. If a gas port is big enough to run a 10.5" on a carbine gas sytem, then a 16" carbine with the same size gas port would be way overgassed. The owner did not seem to understand this, or even grasp the concept of gas port sized to the gas system/length. Every barrel I ordered I speced the gas port size I wanted, this was easy because look at a noveske, daniel defense, or bcm and they put the development work in to find what size hole for each setup that would run smoothly without being overgassed on a H buffer.. Although its probably worked out by now, I understand they just sent out 300 blackouts with not done correctly either. I was happy with what I got (and they fixed the incorrect length barrels I bought), back then I think I was paying around $130-150 for the barrels that are $250-300 that was a great deal.