I don't have a favorite 80/20 lower per se. I've finished forged CNC blanks and they were all high quality materials and process. (E.g., machining didn't uncover any unexpected voids/pockets). If you stick with the "best" makers I don't think you'll be disappointed. I've heard horror stories but have never personally seen a bad quality 80/20.
People say that CAST receivers are to be avoided. I've never seen one in person but it's probably a good rule of thumb.
Last edited by mikikanazawa; January 18, 2013 at 04:50 PM.