New Jersey Magazine Limit: 10 Rounds

New Jersey Statutes section 2C:39-1(y) defines a large capacity ammunition magazine as a box, drum, tube, or other container capable of holding more than 10 rounds to be fed continuously and directly into a semi-automatic firearm, excluding an attached tubular device capable of holding only .22 caliber rimfire ammunition. Section 2C:39-3(j) makes knowing possession a fourth-degree crime unless the person has registered under one of two narrow exceptions: a registered assault firearm whose magazine is used in competitive shooting matches sanctioned by the Director of Civilian Marksmanship, or a firearm with a fixed or detachable magazine capable of holding up to 15 rounds registered under section 2C:39-20.

On July 17, 2026, the en banc Third Circuit held New Jersey's large-capacity magazine restriction unconstitutional in Association of New Jersey Rifle & Pistol Clubs, Inc. v. Attorney General New Jersey. On August 4, 2026 the court stayed its mandate pending the Supreme Court's final disposition, so the restriction remains in effect, and on October 1, 2026 New Jersey filed a cert petition (No. 26-452) asking the Supreme Court to hold the case pending its decision in Viramontes v. Cook County.

There is no federal magazine capacity limit; the 1994 federal assault weapons ban expired in 2004.

Federal baseline verified 2026-10-20. Scope: Detachable magazine round-count restrictions for handguns and long guns. States not listed have no capacity limit.