Prime Minister Jacinta Ardern said her cabinet will consider the details of the changes on Monday.

She has said options include a ban on private ownership of semi-automatic rifles that were used with devastating effect in Christchurch and a government-funded buyback of newly outlawed guns.

Curtailing gun owners' rights is a political battleground in the US but Christchurch gun owner Max Roberts, 22, predicted Ardern won't face serious opposition to her agenda.

"There will be no opposition to it. There's no movement in New Zealand for that. Our media and politics are more left wing," said Roberts, a carpenter who uses guns for hunting.

Elliot Dawson, who survived the shooting at Christchurch's Linwood mosque by hiding in a bathroom, hopes New Zealand follows Australia's lead on gun control.

In Australia, a virtual ban on private ownership of semi-automatic rifles and a government-funded gun buyback cut the size of the country's civilian arsenal by almost a third.

The ban followed the 1996 massacre in which a lone gunman used assault rifles to kill 35 people in Tasmania in 1996.

"Personally, I don't think guns should be legal at all. Maybe in some extreme self-defence, but I don't think they need such firearms like that," Dawson said.

"New Zealand is not America. America is a totally different situation. I think in America it would be probably more dangerous to take people's guns away. But here, I don't think we need them at all."

Akshesh Sharma moved to Christchurch from Fiji to study. He was shocked that the shooter was able to get his hands on such military-style weapons.

Sharma agrees with the prime minister that gun laws need to be tightened.

"I don't see this as a place where you need guns to live to feel safe," Sharma said. "I can understand in the US maybe, but here it's a different story."

Roberts, the gun owner, doubted banning certain types of weapons would be effective. But he said New Zealand should only allow its own citizens to buy guns.

Brenton Harrison Tarrant, the Australian charged in the Christchurch shootings, obtained a New Zealand gun licence in November 2017 and started legally amassing an arsenal of five guns within a month.

"I think when people harbour hate like, that these things are possible," Roberts said.

"Particularly Australian citizens, I don't understand how they can get access to firearms in New Zealand when New Zealand citizens can't get access to firearms in Australia," he added.

Ian Britton uses a rifle for shooting rabbits and target shooting. He favours outlawing assault rifles like those used in Christchurch because they're unnecessary.

"I can't use the words I'd like to use, but it's disgusting. I never thought I'd see that in this country," Britton said.

Ardern noted that attempts to reform had failed before under pressure from the gun lobby.

"There have been attempts to change our laws in 2005, 2012 and after an inquiry in 2017. Now is the time for change," she said.

Australian Associated Press