Bolts and barrels are not supposed to be exported from the US without authorization. There is no restrictions to import barrels or bolts into Canada as far as I know. Of course controlled parts such as prohibited barrels, high capacity mags, frames and receivers you would be required to import using the channel.
Here is the skinny on exporting from the US:
http://www.gunpartscorp.com/RestrictedModels.aspx
Here is the skinny on exporting from the US:
http://www.gunpartscorp.com/RestrictedModels.aspx





















































