Originally Posted by The Saint
Replica firearm classification ignores the device's ability to fire projectiles, unless the device meets the required fps and ME to be a firearm. Then the device is straight up a firearm.
In theory only, the practice as you are aware is quite different. The old "bodily injury" idea is the only reason that Crosman can legally sell their products in Canada without having those pesky registrations for a firearm to worry about. That's the division between an airsoft replica and a BB/pellet gun non-replica, even though they have a Beretta or Colt gun that would easily meet the definition of a replica.
It's not written in law, but is applied in practice, and has upheld an over 100 year tradition of BB guns not being considered firearms, or having any federal regulation at all, except to set an absolute limit on their performance. Even then, in 1995 when the last act was drafted and the 500 fps limit was established, it didn't address all the lightweight ammo available for these guns, and the OIC had to go in and add the energy requirement explicitly to continue to exempt airguns.
This has been the thorn in my side over this for years, why the RCMP insist on their 407 fps, beats you with in CITT proceedings, allows airgun manufacturers to use it to sell and import product, but won't give us that same benefit.