Not a fan of the mech tech either. Its a niche gun/accessory. 500 bucks for an "upper" receiver for a glock or a 1911. 400 for the upper then another 35 for a stock adapter then the stock.
That and whether or not it makes the pistol frame questionable as an SBR when its converted back to a pistol on the whim of the ATF.
Not many options for us .45 guys, besides those butt-ugly Hi-Points.
And that point you made about the atf is precisely why I'm only getting a completed 1911 frame. I don't own any other 1911 parts.