"In short every semi-automatic weapon used in the terrorist attack on Friday will be banned in this country", said Ardern.
Parts that are used to convert guns into military-style semi-automatics (MSSAs) have also being banned, along with high-capacity magazines and parts that cause a firearm to generate semi-automatic, automatic or close-to-automatic gunfire.
She said a buy-back scheme would be set up for banned weapons, and that measures would be imposed to prevent a run on buying before the law comes in.
The bodies of another six victims were expected to be identified and released for burial.
New Zealand's worldwide spy agency, the Government Communications Security Bureau, confirmed it had not received any relevant information or intelligence before the shootings.
The suspect accused of carrying out Friday's terror attack in Christchurch, New Zealand, was likely on his way to carry out a third shooting before he was stopped by authorities, New Zealand's top police official said.
Islamic tradition calls for bodies to be cleansed and buried as soon as possible.
Those present included Hamza's younger brother, 13-year-old Zaed, who was wounded in an arm and a leg during the attack.
Work has been underway to make sure the two mosques that were attacked can re-open on Friday.
Recep Tayyip Erdogan in Canakkale in western Turkey
Hundreds of mourners gathered in a Christchurch cemetery on Wednesday for the first funerals of those killed in the twin mosque massacre as New Zealanders braced for days of emotional farewells following the mass slayings.
Police said on Thursday they identified and were able to release to the families all 50 bodies.
A 44-year-old businessman was remanded in custody after a preliminary court appearance in Christchurch Wednesday on charges of distributing footage of one of the mosque shootings. Tarrant then went on LIVE stream the attack on Facebook which was viewed by 200 people before it was removed, reports Washington Post. "We will have a heightened presence tomorrow in order to provide reassurance to people attending the Friday call for prayers", police said in a statement on Thursday.
Police Minister Stuart Nash said the commissioner could not believe how fast the alleged shooter was arrested.
Hart said it was an easy decision for him to hand in his semi-automatic and tweeted: "on the farm they are a useful tool in some circumstances, but my convenience doesn t outweigh the risk of misuse".
He said members of the Linwood mosque, where the gunman killed at least seven people, also would attend. She said the guns will eventually be destroyed.
New Zealand is "trying to learn from the process that they've gone though", she said.
Police finished their investigation at the Al Noor mosque, where 42 people were killed, on Tuesday night.
Apex Legends Season 1 begins tomorrow, Battle Pass details revealed
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