TORONTO — After a gunman rampaged across rural Nova Scotia in 2020, killing 22 people in Canada’s worst mass killing, Prime Minister Justin Trudeau banned some 1,500 makes and models of “military-grade” assault-style firearms and pledged to buy them back from owners.The most strident opponents, including the United Conservative Party government in Alberta, are suggesting the Royal Canadian Mounted Police “refuse to participate.” Tyler Shandro, the province’s justice minister, declared the buyback was not “an objective, priority or goal” of the province or its Mounties.Alberta and Saskatchewan, long estranged from the capital, recently introduced bills to seek greater “sovereignty” for their provinces and to fight what they see as federal “intrusion.” Most provinces and territories contacted by The Washington Post, including those that support the gun buyback, said they were waiting for more details on what will be required of them.Mendicino told The Post that he “will always keep an open door to listening to the needs of my provincial and territorial counterparts when it comes to policing and resources.” Trudeau’s government is attempting to tighten gun laws further this year with a bill to “freeze” the buying, selling and importation of handguns, to stiffen penalties for gun smuggling and to introduce “red flag” laws that would allow judges to temporarily remove firearms from people deemed a harm to themselves or others.The government estimates that there are approximately 150,000 registered firearms in Canada that would be bought back."