or maybe the upper could become the controlled portion of the firearm. and yes, that would require administrative changes...
but that's not to say it's impossible. certainly in the u.s. they're able to differentiate between SBR AR15s and their longer barreled siblings, so it might be do-able in Canada also....
No. You change the barrel to a shorter one without proper registration and licensing, you pay the price because you broke the law.
Many NR firearms can have barrels replaced with shorter ones.


















































