How accurate is in group size is your cmmg kit and at what distance .
The only cmmg 22 kit in a guys DD m4 did not show very good accuracy with him or with me shooting it and I use to 22lrs rifles that can shot moa groups and a but less .
I like a dedicated 22LR upper. It's cleaner and better groups than the people using a CMMG 566 chamber insert. The 556 twist rate is wrong for a 22LR not to mention the crud that gets stuck in the gas port, tube and carrier key.