I bought the CMMG and have had it for over a week and love it, I have put a brick of cheap 22lr though it with one miss fire. I have only shot it at 25yds and it did well but I hear past that it will not do so good but heck it sure is fun and cheap to shoot. I can not afford to dump a 223 mag but dumping a 22lr mag sure is cheap and just plain fun. I thought about buying a 10/22 again " had one when I was a kid" but I want to shoot my AR but cheaply.
When I want to shoot for distance I can swap out the bolt and mag back to 223.
Here is a short vid I took today showing the reliability. I am no pro at shooting an AR so I am sure my stance is not what it should be lol.