I would read the exact article they quoted in the seizure notice and ensure the item does not meet the description listed therein.
Then, write & mail (or fax) a letter explaining exactly why it does not meet the description in the tariff they state.
Wait 3-4 months while the item is sent to the Firearms Official for the CBSA.
Hopefully, you will have your slide returned to you. If you don't, they will at least tell you why.
Either way, let us know.
