Carol Pomana feels slightly uncomfortable about shopping for guns just days after the Christchurch terrorist attack on two mosques that left 50 people dead and dozens more injured.

Key points: New Zealand Cabinet will meet today to discuss tighter gun ownership regulations

New Zealand Cabinet will meet today to discuss tighter gun ownership regulations Gun control campaigners are pushing for military-style semi-automatics to be banned urgently

Gun control campaigners are pushing for military-style semi-automatics to be banned urgently Shooters believe they are already subjected to a stringent vetting process

"In some ways, I feel like it's inappropriate because of what's happened," she said.

However, she believes change is coming as the New Zealand Cabinet meets on Monday to discuss tighter gun regulations.

"That's why we're here today," she said, after emerging from Christchurch's Gun City store.

"If we do not purchase the guns we'd like, we're going to miss out on that opportunity.

"It's just being realistic."

Even though a crackdown could affect her ability to own guns, she believes stronger laws are justified.

"It's just too easy [to get a licence]," she said.

Ms Pomana, a target shooter, said she would like to see stronger vetting of gun owners, including psychological testing.

"It's about the people behind the gun. A gun can't pick itself up and shoot you. It's about the mentality of the person," she said.

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Watch Duration: 28 seconds 28 s NZ gun owner comments on law changes (Photo - ABC News: Barbara Miller)

Ms Pomana is a member of a sporting shooters club in Christchurch.

"Guns are very safe in our hands," she said.

"We are definitely only supporters of firearms for sport, not for anything else."

There are an estimated 1.5 million guns in New Zealand and firearm ownership is far more common than in Australia.

Billboards near the Gun City store portray shooting as a lifestyle activity.

One poster advertising an air rifle carries the slogan "Get the family outside".

Another says "Start an adventure".

The owner of Gun City, David Tipple, said on Monday that accused gunman Brenton Tarrant had bought weapons from the store online.

"I've informed the police that Gun City sold the alleged gunman four A category firearms and ammunition," Mr Tipple said.

"All Gun City sales to this individual followed a police-verified online mail-order process."

Christchurch attack is NZ's 'Port Arthur moment'

Jacinda Ardern's Government will consider tighter restrictions on semi-automatic weapons, like the AR-15, which was among the arsenal allegedly used by the accused gunman.

The AR-15 can be bought using a lower-level category A licence, however it is believed the gunman modified some weapons to increase their capacity.

Gun control campaigners say military-style semi-automatics, which are available on higher-level licences in New Zealand, need to be banned urgently.

"These are the guns that kill people," Professor Kevin Clements, from the University of Otago, said.

"[A ban] has been strongly resisted by the gun lobby," he said.

Professor Clements believes Friday's attack will change public perceptions about high-powered guns.

"This is a moment … John Howard was able to institute the most far-reaching gun laws in Australia after the Port Arthur massacre," he said.

"Jacinda Ardern and her Government here — and I hope it would be a bipartisan policy — could do exactly the same."

Gun ownership is more common in New Zealand than in Australia, where it is easier to purchase a weapon. ( ABC: Barbara Miller )

Nicole McKee, secretary of the Coalition of Licenced Firearm Owners, said gun owners were already subjected to a stringent vetting process.

However, she said changes to some gun laws may be appropriate.

"We have made it clear to some government agencies that we are open not to lobby them, but to have some frank discussions about what we can do to assist this country to ensure that this sort of thing cannot happen," she said.

"What we don't want to see is kneejerk legislative changes because they will always have unintended consequences."

'Nobody should have a semi-automatic weapon'

Alaa Osman, whose friends Osama Adnan and Monier Soliman were killed inside the Al Noor mosque, said gun reform was long overdue.

"If someone needs a rifle for target shooting or hunting, OK. I understand that; it's something here in the culture and I totally respect that.

"But why semi-automatic weapons? Nobody should have a semi-automatic weapon. It's just wrong."