The MA Attorney General recently clarified the legality of the Ruger
Mini-14 because they screwed up when it was declared "legal".
It's still subject to some confusion but her clarification
says that a ".22 cal rimfire" is legal but .223 cal (NATO) is not.
I don't think the Mini-14 is available as a .22 cal rimfire but
am not sure.
Yeah, they call it the 10-22 ;-)
It is not really the same gun tho except in the most superficial
outward appearance. (An M1 Carbine sort of look)
My Ruger .44 is very similar looking too, actually just a slightly
bigger version of the 10-22. They are both straight blow back
operation. The Mini-14 is a rotating bolt thing.
I had a Ruger 10-22 for a while but it was the model that looks
like the M1-Carbine.
I gave it to my grandson after he joined the Army.