I would assume that isn't a working silencer? Quite a bit of legal hoops to jump thru for a real one...
Not really. You pay a $200 tax, get a letter of recommendation from a Chief of Police and submit to a BATF (Bury All Thy Firearms) background check. Then you just buy the device itself. Same goes for a ClassIII full auto. Same fees, except the cost of the weapon will range much higher...maybe in excess of $3,000. Then the cost of the ammo is big $$$ since you might be going thru 9mm at the rate of about 30 rds ever two seconds.....