Loose tolerances - Fortis Manufacturing Fortis Billet Upper Receiver

Very well machined & finished, lightweight, aesthetically pleasing. So, why am I giving it 3 stars? The barrel extension to receiver fit is very loose. If you're from the school that finds a nice easy slip fit desirable, have at it, you'll love this. I know, for most users barrel nut torque holding the barrel is good enough.

I'm not one of those users. Ideally, I like to have to thermal fit barrel to upper, but I'll settle for a snug press fit when I have to. This is neither. Back to OP it's going.