Obtaining a license involves police background checks and firearms safety.
"Jacinda Ardern has said emphatically that New Zealand's gun laws will change and that now is the time for that change", Police Association president Chris Cahill said in a statement online. He is the only person in custody linked to the killings and has been charged with murder.
Netizen Ciara Mitchell gave alarming news of how she tried to report the video when it surfaced in her newsfeed but got a message that the content didn't violate any guidelines.
On Monday, the e-commerce website Trade Me, similar to eBay, halted the sale of semiautomatic weapons on its platform. She urged all social media companies to take responsibility for how their platforms were used both before and after the mosque attacks. On the farm they are a useful tool in some circumstances, but my convenience doesn't outweigh the risk of misuse.
"We have good laws, we've always had good laws", said Wayne Chapman, owner of The Gunshop in Upper Hutt, a city northeast of Wellington.
Also on Monday, a Christchurch gun shop acknowledged that they had sold the gunman four weapons and ammunition through a "police-verified online mail order process".
Gun City has been the focus of criticism and has seen small protests outside their stores in recent days.
"The killer's gun was purchased legally and that's part of the issue".
One possible new route would be the introduction of a buy-back program, along with closing existing loopholes that allow the import and adaptation of powerful guns, said David Small, a lawyer and professor at Canterbury University in Christchurch, to CNN. "We detected nothing extraordinary about this licence holder", he told reporters.
The two mosques involved in the shootings have been closed since the massacre, but are expected to reopen by Friday prayers after cleansing blessings were carried out, said Haumaha. Because we represent diversity, kindness, compassion, a home for those who share our values, refuge for those who need it.
"He was a brand new purchaser, with a brand new licence", he said. "How has this loophole not been fixed?"
Under New Zealand gun laws, A-category weapons can be semi-automatic but limited to seven shots.
"I can't put it to words", Ahmed told CBS News. Australia now has one of the lowest gun murder rates in the world.
A buyback program destroyed thousands of guns and high-capacity magazines. "Have owned a firearm for 31 years".
Conservative estimates suggest that 90 per cent of that figure can be attributed directly to Google, meaning the company makes well in excess of half a billion dollars from its New Zealand advertising business.
The two mosques where the shootings took place were still closed on Monday, but police hoped to have them open by the end of the week. Ardern has promised details of changes within 10 days of the attack.
He grew up in the small town of Grafton in Australia, but had travelled widely in recent years.
Before Friday, New Zealand's worst mass shooting was in 1990 when a man killed 13 men, women and children in a 24-hour rampage in the seaside village of Aramoana.
He said that in the aftermath of the Christchurch massacres, he had "a real outpouring of concern" from senior marketers asking what they could do to help change this.