Upper Receiver????

[A5BLASTER]

As far as I can tell, there are basically 3 speeds.

-Basic upper - where there's no difference between a cheap Anderson and more expensive Spikes, or whatever.
-Tight Upper - of which BCM is the best known. It's basically a standard spec upper, but they run their fit such that a 0.999" standard barrel extension is going to be TIGHT. In theory this is more accurate. I don't think it's a bad thing, but once you put 60 ft-lb of torque on the barrel nut, I'm not convinced it's super important. That said, given the choice, I kind of prefer this route (other route is to run a 1.000" barrel extension btw)
-Premium feature. Which tend to be the billet, or otherwise exotic configuration; which has cool personal preference points, but otherwise not functionally any different.

In general, when it comes to recievers, I find your basic Anderson is as good as anyone else, for a lot less cost - and know from a few manufacturers that Anderson tends to OEM their same lowers for some of the boutique brands. Nothing wrong with the Poverty Pony. But again, for near the same price, I hve grown to prefer BCM, for the tighter fit

60 ft lbs good lord what are you shooting? A howitzer?

Only barrel nut I ever put more then 35 lbs on was one that used a nut that had all the teeth on it to line up the gas tube properly.

All my current guns with free float tubes and non indexing barrel nuts get 35 lbs.