After reading up on them a bit I decided to order a couple. I know some were out of spec and some were good. Well out of the 2 I got one is perfect and the 2nd was out of spec a touch. Luckily it was only at the front takedown pin where the upper slides in. The gap was too tight and needed to be opened up a bit (see pic). A small file and some elbow grease and fits like a dream. Of course the finish needs to be redone but that's ok. I planned on duracoating one in FDE anyways so no harm done. I guess if you're planning on a build that's going to require refinishing, then at $65 each you can't go wrong but if be hesitant to buy one if you don't plan on refinishing since it could be slightly out of spec and you may need to "fit" it. That said, would I buy one again? In a perfect world when options are available under $100? No. But since all this AWB talk had everything sold out I took a chance. Wanna kill these ads? We can help!