it is illegal to own a knife in canada that can be opened with a spring, or centrifical force (something i can do with ANY folding knife fresh outta the packaging) i should know...seeing i have a prohibited weapons conviction in my jacket. i grew up as an army brat, was very active in martial arts, and the weaponry.....i have reaserched all aspects of edged weapons, please dont say that you can possess one of these stearing people towards criminal charges.

Not If it is home made and is not diplayed in public

No In Canada It's illegal to have any spring action, inertia/centrifugal action, gravity assited knives, push knives, or bladed/spiked rings and wristbands. Even if you're a collector. I'm Canadian as well and collect knives, swords, bayonets, spears etc. And I need a permit for my Stiletto (the classic flip out switch blades.) A couple times I've been detained by the cops for having knives like godfather's (the classic OTF knife) and butterfly knives. The only place I know where they don't enforce that law in Canada is in the bad side of Ottawa (near the army bases) and thats only if you if you don't hide/conceal it.

ok thanks il keep that in mind :)

Canada

Certain knives are designated as 'prohibited weapons' pursuant to the Criminal Code of Canada. Section 84(1) defines such knives as "a knife that has a blade that opens automatically by gravity or centrifugal force or by hand pressure applied to a button, spring or other device in or attached to the handle of the knife".[7][8] By law, only those who have been granted exemption by the Royal Canadian Mounted Police via the Canadian Firearms Program are allowed to possess (but not acquire) prohibited weapons.

If one is found to be in unauthorized possession of prohibited weapon by any law enforcement officer, he or she is liable to maximum of 5 years in jail and the weapon being seized. The peace officer can then apply to a provincial court judge for the said weapon to be forfeited and be disposed as he or she sees fit. The import and export of such devices are also strictly regulated and enforced by the Canada Border Services Agency.[9]

Examples of such knives include:[10]
automatic knives such as switchblades
centrifugal knives such as flick knives or butterfly knives;
gravity knives;
Constant Companion (belt-buckle knife)
finger rings with blades or other sharp objects projecting from the surface;
push daggers;
spiked wristbands;

One-handed opening knives have been designated as legal to import by Canada Border Services as long as they don't fall into one of the prohibited categories.

There is no length restriction on carrying knives within the Criminal Code of Canada; the only restriction is for concealed carry.

Personally, I say make it so you can mount a blade. Make a blade. Then make a fix blade handle that you can also mount the blade on and keep it on that handle. It's how a lot of people skirt automatic weapons laws too. As long as the trigger mounted in the gun is single fire or the firing pin is removed and the trigger assembly that is automatic is in pieces, even if you can fix it, they can't actually prove that you've ever had it assembled or used it in an illegal way. I live in a pretty lax state when it comes to this stuff though.

if you cant put a blade on it put on something else! (well thats what I would do) and you should ( if you add a blade) make a loader so you dont cut your hand.