Looking through old posts and seeing this. Thanks for all the good information. I know the 15-22 is a no go, but would a CMMG bolt conversion AR in .22LR be acceptable? I don’t have a 10/22 but I’m interested in doing an Appleseed after getting back into shooting after 20 years away.
I know of no prohibition on CMMG bolt conversions in AR's. In fact, I frequently loan my Ciener conversion and my AR to people - no issues so far.
Contrary to other's experiences, I have found my AR (1:9 twist) with the conversion kit and CCI ammo to be acceptably accurate. I've shot 2 1/2 to 3 MOA with it, which is pretty good while "slung up"; especially with a red dot.
At almost every event the Shoot Boss or other instructors will have loaner rifles just in case you find your conversion is not accurate enough for you. Or you could just shoot it full bore - centerfires are completely OK at Appleseed events unless the range prohibits it.