I have seen CMMG at gunshows with this offer before. These are not CMMG guns. They are parts guns that they have put together from pieces that they have picked up in their travels and will have uppers and lowers from various other manufactures. The guns may have cosmetic flaws and missing parts such as dust covers. This is not to say they are bad guns. CMMG has headspaced and test fired all the guns. I would look at them as more of a cheap range plinker than a serious work gun.