Clipper,
You do not state what country you come from, so I will not make any assumptions on what is legal or illegal where you reside. Need less to say, there are a lot of regualations in the US, but nothing impossible. Generally speaking, though, IMO, conversions are to be avoided. You would be much better off to obtain a weapon that was designed for FA fire, or professionally modified to fire FA. As far as I know, the 10/22 was never designed for FA fire, so this, while a fun choice, would have to be a conversion.