I guess imschur could answer this, as he has a great site for this. But, I thought you guys would like some input on this also, so I will ask it over here instead!!! I had a CMMG at one point and sold it, but I wish I would not have. What is the best dedicated upper out there in .22 LR? I am really liking the Billet Mags by BlackDog that you showed us imschur!!!!