My JP Enterprises .22 Upper is literally as good as my CZ457 accuracy-wise. I had them do the Complete upper so I wouldn’t have assembly issues and it’s outstanding, but was pricey (don’t know how that compares to other dedicated .22 AR build prices).
I was thinking for NRL22 it's be nice to have full size mags if the COF has a reload. I fumbled around with my 455 on the reload when I shot. I think going with a Keystone Accuracy barrel and CMMG bolt group.
I also think I should have more time without running a bolt.