I had a dedicated CMMG AR 22 I surrendered in 2019.
Who was to know I could have kept the bolt, barrel, handguard and mags to fit to a UTAS 556 and still have a functioning legal gun? :(
IMO
Pros for AR based 22 platform.
Adjustable stock allows smaller framed humans (ie kids) correct length of pull without taking a hacksaw to the stock.
Other ergonomics are well though out.
Big easy to handle, load and not lose magazines. Contrast that to fiddly sharped edged lips 10/22 mags.
Lots of aftermarket parts, mounts etc to fit.
Kids show an interest in shooting one cos of 'cool' factor.
Get the fudds stirred up.
Cons.
Heavy, with rear bias. So kids usually need to shoot off bipod/rest.
Alloy handguards suck in cold weather.
Get the fudds stirred up.
Conclusion. Get a Tippman. It legal to own one.