Owners of these “military-style” weapons will be granted a two-year amnesty period.
Public Safety Minister Bill Blair said he wants to bring in new legislation as quickly as possible.
Tit-for-tat attack ads light up Toronto-area screens days election day.
The Liberals are pledging to work with provinces to give cities the power to ban the weapons.
The Liberal leader hinted the party will introduce new gun control measures during the campaign.
The Liberals have been reluctant to consider sweeping changes until after the federal election.
Justin Trudeau should follow the example of New Zealand's leader by swiftly announcing long overdue bans.
The country's prime minister expects the new law to be in place by April 11.
The attacks unfolded at two mosques.
"People fear what they don't know."