Hello there
Welcome to Airsoft Canada.
First of all, fill out your profile so we know who you are and age.
I would strongly suggest you to read the FAQs (located here:
FAQS To know more of the situation and regulation fo airsoft In Canada.
I would strongly suggest you to get Age verified too. to be Age Verified you need to be 18 years of age or older. Proven by a piece of Government ID. Link can be found here:
How to get Age Verified?
That said. You CANNOT import Airsoft replicas in Canada, you Need to buy from a Canadian retailer. And to do so you need to be Age verified. Any attempt to Import Airsoft replicas will be seized by the CBSA and you can get in trouble.
And as for the Gas, A lot ( if not all ) GBB ( gas Blow Back ) riffle or Pistols can accept Propane gas.
I won't go further down the road. Do a little research and read the FAQs. Really Importent.
I hope you will enjoy your stay.