Welcome to the forum. I am also from NJ and have a 15-22 that was brought into compliance with NJ laws by my NJ dealer
The colapsable stock must be pinned or made un-movable by some permenent means. Also the magazine must be limited to 15 rounds by a permenent means. You can read copies of the NJ firearms laws on the NJ State Police website.
The State Police site states that simply pinning the magazine does not constitute a permenent alteration to a large capacity magazine, But that is how my magazine was altered from new from the NJ dealer. I plan on altering it further to match the letter of the law.
Where did you find a SIG522? Here in NJ? I plan on the 522 to be my next purchase as soon as a compliant one is available or I can purchase a non-compliant one out of state and convert it myself.
My 15-22 is among the 75% here on the forum poll the are working as intended with no feeding or extraction issues. I put another 100 rounds through it this morning at a local range and it operated 100% as it has in the past.
LTC
The State Police like to interpret laws to their liking. For NJ
Go to
http://www.state.nj.us/njsp/info/pdf/firearms/njac-title13-ch54.pdf and look at the actual laws. Specifically 13:54-5.5 Large capacity magazines
A retail or wholesale firearms dealer licensed pursuant to this chapter may maintain large capacity ammunition
magazines at its licensed premises for sale or disposition to another dealer, the Armed Forces of the United States or the
National Guard, or to a law enforcement agency, provided that the seller maintains a record of any sale or disposition
to any of the afore-mentioned entities, including a description by make and model of the large capacity magazine. The
record shall include the name of the purchasing agency, together with written authorization on the official letterhead of
the Superintendent, chief of police or highest ranking officer of the agency or the appropriate ranking military officer,
the name and rank of the law enforcement or military officer authorized to make the purchase, and the date and time of
the sale or disposition. A copy of this record shall be forwarded by the seller to the Superintendent within 48 hours of the sale or disposition.
There is no mention of how the mag needs to be limited.
3. A semi-automatic shotgun with either a magazine capacity exceeding six rounds, a folding stock or a pistol grip;
or a semi-automatic rifle with a fixed magazine capacity exceeding 15 rounds. For purposes of this paragraph,
"semi-automatic" means a firearm which fires a single projectile for each pull of the trigger and is self-reloading or
automatically chambers a round, cartridge or bullet. For purposes of this paragraph "pistol grip" means a well defined
handle, similar to that found on a handgun, that protrudes conspicuously beneath the action of the weapon, and which
permits the shotgun to be held and fired with one hand;
"Large capacity ammunition magazine" means a box, drum, tube or other container which is capable of holding more
than 15 rounds of ammunition to be fed continuously and directly therefrom into a semi-automatic firearm.
This is not legal advise, just a showing of the law in New Jersey. Look at the laws yourself. Do not let the powers that be dictate what they say or mean. That is up to the individual. It's also how we keep our individual liberties. The price of freedom is eternal vigilance, Thomas Jefferson. Apathy will bring about eternal slavery, Me.