"At 1pm on the 15th of March our world changed forever, and so will our gun laws", Mr Peters said.
Earlier Monday, the New Zealand arms dealer who sold weapons to the suspected mosque attacker said he felt no responsibility for the deaths of 50 worshippers who were gunned down. Further north, in Auckland, an unnamed gun shop owner reportedly had a significant increase in the sales of semi-automatic weapon and multiple phone enquiries about how much stock was left in store.
Sky New Zealand, which is the Pacific nation's largest satellite provider, even temporarily pulled Sky News Australia off the air after it repeatedly showed a portion of the video.
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.
New Zealand Prime Minister Jacinda Ardern is expected to try and gain support for more restrictive gun laws when she meets Cabinet on Monday after declaring over the weekend that New Zealand's gun laws "need to change" and "will change".
"We have listened to public sentiment following Friday's terrorist attack in Christchurch and chose to remove all semi-automatic firearms sales and parts associated with those weapons today", Trade Me's statement reads.
The tightened gun laws will put New Zealand in line with several other countries who have changed legislation in the wake of tragedy.
Ms Ardern has spoken about requiring licenses for individual guns, rather than for users, and banning semiautomatic weapons.
"The primary aim of the activity is to formally obtain material that may assist New Zealand Police in their ongoing investigation", the agencies said in a joint statement. The New Zealand Police Association has long called for reform of the 1983 Arms Act, in which gun registration was abandoned in favour of controlling users rather than the firearms.
Only firearm owners are licensed, not weapons, so there is no monitoring of how many weapons a person may possess.
New Zealand Prime Minister Jacinda Ardern speaks to representatives of the Muslim community at Canterbury refugee centre in Christchurch, New Zealand March 16, 2019.
Ms Ardern was the first signatory of a national condolence book for the worst peacetime mass killing in New Zealand that she opened in the capital Wellington on Monday. "We are one. They are us", she wrote in the book.
Tributes continue to pour in for the victims, as some of their families wait for bodies of those killed to be released after post mortems.