[Ricochet]

You made a mistake, but mistakes come with consequences. They don't hate you, it's about the fact that not declaring something is very serious, and it could've landed you in more hot water. Accept that you've been flagged. If you want to smooth out your future flying experiences, be 100% agreeable when you get searched, it's a small price to pay.

Your gun is gone, Canada has laws, the CBSA has their own mandates, and they shouldn't have to waste time and tax payers dollars testing your gun. There are ways to legally import airsoft guns, but there must be documents proving it shoots over 366 FPS, with a 6mm 0.20g round, or else it is deemed a replica. The alternative is your gun looks different from a real firearm enough that it can't be a replica. No paint or orange tips don't count, it must a clear receiver, etc, etc.

Keep in mind that the CBSA has the right to seize and destroy any airsoft guns they want, wether the protocol was followed or not. In your case, I would never try bringing in something like that again as you're on the list.

If your destinations allow for guns to be brought into their countries, you can bring it from Canada and then return it with the right document. Y-38, I believe it's called, basically records your gun here, and then as long as it's the same gun in the exact same shape, then it may re-enter Canada. Make sure you brush up on all applicable laws.