The New Jersey Assembly has passed a bill that would outlaw ammunition magazines that hold more than 10 rounds.
The bill also has cleared the state Senate and now will go to Gov. Chris Christie for his consideration.
Parents of children killed in the 2012 Newtown, Connecticut, school shooting joined Democrats Thursday in calling for Christie to sign it into law.
The Republican governor signed many firearms bills into law last year. But he issued conditional vetoes of some of the more contentious ones, including a ban on .50-caliber rifles.
Advocates say the ammo magazine limit could make mass shootings less deadly.
Gun-rights supporters say it would make it harder for citizens to protect themselves and could have the effect of banning certain guns.