No registration to be a manufacture or anything official like that. Do what you want as long as it's legal.
No balisongs, no punch daggers, no throwing stars, no brass knuckles, no autos,
no gravity knives - so any folders can not be flip-able this especially relates to friction folders and linerlocks
It used to be D guards were a big no no, but if not
intended as a weapon it's ok now.
I don't know how karambits fit that as they are intended as weapons.
No length limits, so anything anyone tells you about a length is BS
-except that cane swords have to be OVER twelve inches.
It's all about intent, if a cop asks you why you have it and say for protection, you're going to jail.
You can search the laws and read them yourself.
They are HIGHLY specific and VERY easy to find
http://laws-lois.justice.gc.ca/eng/regulations/SOR-98-462/FullText.html
Don't trust what we tell you
Don't ask cops about laws, they have no idea and will just feed you BS to avoid looking stupid
Read the laws until you understand them
A judge or lawyer that
specializes would be the best for specific questions.
CS:GO
Is that some sort of video game stuff ?
I won't get shortcut references to that sort of thing, If we need to understand that, spell it out.
Naming your models Throat Slasher and that sort of thing will not be helpful.