Currently threaded muzzles are trendy, stay away from them if you can.

I recently purchased a Ruger PC carbine, fine gun, but it came with a threaded muzzle, without which feature and with 10 round Glock magazines it would actually be legal in NY State when I visit family (fuggin Cuomo’s “Safe Act” mad)

Ruger does make a “State Legal” version without the threaded muzzle, all sold out at this point in time.

"...if the gentlemen of Virginia shall send us a dozen of their sons, we would take great care in their education, instruct them in all we know, and make men of them." Canasatego 1744