Ya I'd say your correct if it wasn't for the reintroduction of the firearms committee. Marco Mendicino the public safety minister, has all ready stated that they would have that committee make a list of anything they feel should be banned, and then the liberals would use an order in council like in 2020 and 2022 to ban them. The entire reason they even specified only future firearms, was to get people to not write letters, and to not protest the way they did with the G4 and G46 amendments. While the new amendment will essentially ban all future semi auto firearms with removable magazines. The committee will ban anything else they deem to be military in nature, or what they believe to meet the criteria of Military style, or assault style, or just those that can take magazines with a larger capacity then 5 rounds.
While Marco Mendocino is a lying sack of rotten potatoes. I'll take his word on this one that the committee is their real big stick in this, the amendments not so much. He has made it abundantly clear the committee will have full power to decide what is and isn't an acceptable firearm to own in Canada. This will take the heat off him, and the liberal party for the bans. As they will pass the blame onto the committee one they stacked with anti gun groups and those who tow the liberal line.
If C-21 and the committee come online at similar times they will, almost for certain ban the M1 carbine. They all ready tried with G4. No way in hell they stop trying. All they've done is switch tactics on how to do it. It's now just a matter of when.