A New Jersey compliant AR-15 is a semi-automatic rifle built on the AR-15 platform that avoids every trigger in the state’s assault firearms law: the receiver carries no banned model name, the rifle has no more than one restricted feature when it accepts a detachable magazine, and it feeds from magazines holding 10 rounds or fewer. Miss any one of those and you are looking at a second-degree crime carrying five to ten years in state prison, so there is no margin for a close call.
Receiver Names You Cannot Buy
New Jersey’s assault firearms definition at N.J.S.A. 2C:39-1w lists more than 50 specific firearms by name, and the “Colt AR-15 and CAR-15 series” sits on that list.1New Jersey Revised Statutes. New Jersey Code 2C:39-1 – Definitions If the lower receiver of your rifle is stamped with one of those designations, possession is illegal no matter what you do to the rest of the gun. Stripping a Colt AR-15 down to a featureless configuration does not help, because the serialized receiver still carries a banned name.
This is why manufacturers that sell into New Jersey stamp their receivers with model names outside the list. A rifle mechanically identical to a Colt AR-15 is lawful if the receiver bears a different designation and the finished rifle passes the state’s feature and magazine tests. New Jersey also prohibits firearms “substantially identical” to listed models under N.J.A.C. 13:54-1.2, but that provision targets manufacturers trying to rebadge a banned gun; it is not meant to sweep in every AR-pattern rifle built on a mil-spec receiver.2Cornell Law Institute. New Jersey Administrative Code 13:54-1.2 – Definitions Buying from a reputable NJ-market manufacturer handles both issues at the receiver stage.
The Two-Feature Test
For any semi-automatic rifle that accepts a detachable magazine and is not banned by name, the Attorney General’s guidelines treat the rifle as an assault firearm the moment it carries two or more of these five features:3New Jersey Division of Criminal Justice. Guidelines Regarding the Substantially Identical Provision in the States Assault Firearms Laws
- A folding or telescoping stock
- A pistol grip that protrudes conspicuously beneath the action
- A bayonet mount
- A flash suppressor, or a barrel threaded to accept one
- A grenade launcher
One feature is allowed. Two is a crime. Most New Jersey AR-15 builds keep the pistol grip as their single feature because it is central to how the rifle is designed to be held. Every other restricted feature gets removed or permanently modified.
What a Compliant Build Looks Like
Knowing the rules is one thing. Putting a rifle together that actually passes is where the details matter.
Lower receiver. No listed model name. Buy from a manufacturer whose designation does not appear on the ban list. This is the easiest requirement to satisfy and the hardest to fix later.
Stock. Fixed. A telescoping or folding stock counts as one of the five features, and because you want to keep the pistol grip as your one allowed feature, the stock has to come off the feature count entirely. Owners either install a fixed-length stock or pay a gunsmith to permanently pin a collapsible stock in the extended position. Once pinned so it cannot physically telescope, it no longer counts.
Muzzle device. No flash suppressor. A muzzle brake or compensator is acceptable because those devices redirect gas to reduce recoil rather than hide muzzle flash. If the barrel is threaded, the compliant muzzle device has to be permanently attached. The standard method is pin-and-weld: a gunsmith drills through the device into the barrel threads, inserts a steel pin, and welds over it so the device cannot be removed without destroying it. Once the device is permanent, the barrel no longer counts as “threaded” for the feature test.
Bayonet lug. Removed or ground off. On most AR-pattern rifles the lug sits on the front sight base or gas block. Rifles built for the New Jersey market usually ship without one.
Magazine. Ten rounds, maximum. See below.
The 10-Round Magazine Limit
New Jersey caps magazine capacity at 10 rounds. Any magazine that can hold more is classified as a “large capacity ammunition magazine,” and possession is a fourth-degree crime under N.J.S.A. 2C:39-3(j), carrying up to 18 months in prison and fines up to $10,000.4New Jersey Revised Statutes. New Jersey Code 2C:39-3 – Prohibited Weapons and Devices
This applies to every magazine you own, whatever firearm it was made for and whenever you bought it. If you move to New Jersey with standard-capacity 30-round AR magazines, they become contraband the moment you cross the state line. Magazines must either be factory-built for 10 rounds or permanently modified so they physically cannot accept more. Blocked or pinned magazines satisfy the requirement; a magazine body that could be restored to higher capacity does not.
There is no federal cap in force. The 1994 federal ban expired in 2004. Capacity that is legal across the river in Pennsylvania will put you in state prison in New Jersey.
Barrel Length and the 16-Inch Rule
Any AR-15 configured as a rifle needs a barrel at least 16 inches long to avoid classification as a short-barreled rifle under the National Firearms Act. SBRs are federally regulated NFA items, and New Jersey does not permit civilian possession of them.5Office of the Law Revision Counsel. 26 USC 5845 – Definitions
This is where pin-and-weld does double duty. A 14.5-inch barrel is common, and permanently attaching a muzzle device that brings the total barrel length to 16 inches or more satisfies the federal requirement.6Bureau of Alcohol, Tobacco, Firearms and Explosives. ATF Ruling 2011-4 The same weld that makes the device permanent for New Jersey’s feature test counts toward federal barrel length, provided the attachment is truly permanent.
Workarounds If You Want More Features
Fixed-Magazine Builds
The two-feature test only applies to rifles that accept a detachable magazine. A semi-automatic AR-15 with a permanently fixed magazine escapes the feature test entirely, so in theory you can keep a pistol grip, a telescoping stock, and a threaded barrel on the same rifle. The catch: the fixed magazine still cannot hold more than 10 rounds. A semi-auto rifle with a fixed magazine over 10 rounds is itself classified as an assault firearm under N.J.S.A. 2C:39-1w(4).1New Jersey Revised Statutes. New Jersey Code 2C:39-1 – Definitions Fixed-magazine conversion systems for the AR-15 exist; they trade quick reloads for feature freedom.
The Non-NFA “Other Firearm”
Another route is a firearm built on the AR-15 platform that is legally neither a rifle nor a pistol. These are often called “others.” New Jersey’s feature test applies to a “semi-automatic rifle,” and under federal law a rifle is a weapon designed to be fired from the shoulder. A firearm with no stock at all, just a bare buffer tube, was not designed to be shouldered, so it is not a rifle. A firearm with no stock and an overall length of 26 inches or more also avoids NFA classification as an “any other weapon.”6Bureau of Alcohol, Tobacco, Firearms and Explosives. ATF Ruling 2011-4
Building one legally takes several specific elements. Overall length from the end of the buffer tube to the muzzle must be at least 26 inches. The firearm needs a vertical foregrip so it is not classified as a handgun designed for single-handed use. It cannot have a shoulder stock. The lower receiver must be a “virgin” receiver that has never been assembled as a rifle, because converting a rifle into a stockless configuration can create a “weapon made from a rifle” under the NFA. The receiver should be transferred by the dealer as an “other firearm” on the federal form.
Because an other is not a rifle under New Jersey law, the two-feature test does not apply. It can carry a pistol grip, a shorter barrel, and a muzzle device that would be a problem on a rifle. Magazine limits still apply: 10 rounds maximum. This classification depends on every element lining up from the start, so get it right at purchase rather than trying to convert an existing rifle.
Buying and Transporting the Rifle
Before you buy any rifle in New Jersey, you need a Firearms Purchaser Identification Card. Under N.J.S.A. 2C:58-3, no one may purchase or receive a rifle or shotgun without a valid FPID.7New Jersey Legislature. New Jersey Code 2C:58-3 – Purchase of Firearms The application costs $50, and the licensing authority has 30 days from a completed application to issue the card. Private sales must run through a licensed dealer, who conducts a NICS background check and may charge up to $70. There is no family or friend exemption; every rifle transfer in New Jersey goes through an FFL. An “other firearm” transfer requires the FPID the same way a rifle does.
Transport rules are strict and worth memorizing. Under N.J.S.A. 2C:39-6(g), a firearm being transported must be unloaded and carried in a closed and securely fastened case, a locked gun box, or locked in the trunk.8New Jersey Revised Statutes. New Jersey Code 2C:39-6 – Exemptions You can transport directly to and from your home, a shooting range, a licensed dealer, a hunting location with a valid license, or a firearms exhibition. Only deviations “reasonably necessary under the circumstances” are allowed. Stopping for gas on the way to the range is fine. Stopping at a friend’s house for an hour is not. Keep ammunition separate from the firearm. A traffic stop with a loaded, uncased rifle, even a fully compliant one, exposes you to weapons charges.
What a Mistake Costs
Possessing an assault firearm, whether a banned model, a substantially identical clone, or a rifle that fails the two-feature test, is a second-degree crime under N.J.S.A. 2C:39-5(f).9New Jersey Revised Statutes. New Jersey Code 2C:39-5 – Unlawful Possession of Weapons A second-degree crime in New Jersey carries five to ten years in prison.
The Graves Act adds a mandatory minimum. Under N.J.S.A. 2C:43-6(c), a conviction under 2C:39-5(f) triggers a parole ineligibility period set at half the sentence imposed or 42 months, whichever is greater.10New Jersey Legislature. P.L. 2013, c.113 Even a plea at the low end of the range leaves you serving at least three and a half years before parole eligibility. A repeat offender with a prior qualifying conviction faces first-degree charges.
Large capacity magazine possession is a separate fourth-degree charge with its own penalties, and the charges stack. An officer who finds a non-compliant rifle loaded with a 30-round magazine has grounds for both an assault firearm charge and a large capacity magazine charge. New Jersey prosecutors do not generally treat these as technical violations, and judges have limited discretion to sentence below the Graves Act floor. A rifle that was lawful where you used to live can become a felony-equivalent charge the day you cross the border, so modify or sell before the move rather than after.