The language that you are using is misleading. ALL surfaces on a billet receiver are machined, where quite a bit of the surface of a forged receiver are NOT machined. I don't doubt for one moment that some of the forged receivers have a flaw or other problem, in or on an area not machined, that will put them "out of spec." Any surface of a forged receiver that has to mate with another part IS machined, and I don't believe for a moment that there is ANY, and I don't believe you can claim, difference between a forged or billet receiver on the machined areas.

There is a very fine line between "Hobby" and "Mental illness"