ii. A semi-automatic pistol that has an ability to accept a detachable magazine and has at
least two of the following:
(1) An ammunition magazine that attaches to the pistol outside of the pistol grip;
(2) A threaded barrel capable of accepting a barrel extender, flash suppressor,
forward handgrip, or silencer;
(3) A shroud that is attached to, or partially or completely encircles the barrel and
that permits the shooter to hold the firearm with the non-trigger hand without being
burned;
(4) Manufactured weight of 50 ounces or more when the pistol is unloaded; and/or
(5) A semi-automatic version of an automatic firearm;

Quoted:
Are threaded barrels on handguns legal in NJ?  I'm ordering a conversion barrel for my SIG and the manufacturer called back to see if I was interested in any others at a reduced price.