Basic Canadian law: Replica Firearm =/= Firearm
There is no point in licencing Replica Firearm. The law in place already forbids people from acquiring new ones. It'd be like licensing people to own cocaine.
To require a licence for airguns sounds like it would promote responsibility, however, the end result would be a massive increase in the number of paper criminals even beyond what C-68 caused. The police spends even more time going after licence violations and even less time going after guns that shoot real bullets in the hands of real criminals than they already do.
"The Bird of Hermes is My Name, Eating My Wings to Make Me Tame."