There is no issue shipping to Canada ... I get things sent all the time from the US as well as Europe.
The only problem is shipping is very slow these days due to covid-19.
"Provided a magazine itself is not of prohibited capacity (snail drums for example) it is subject to no regulation and requires neither a PAL or RPAL to purchase or ship, even if it's designed for a restricted or prohibited firearm." If the magazine is of a prohibited capacity all you need to do is restrict the loading capacity to restricted capacity level by use of a plug or other restriction device.
https://www.youtube.com/watch?v=8pr-...ature=emb_logo
DISCLAIMER: It is up to YOU to know the gun laws and regulations.
They vary state to state in the USA and province to province in Canada.
In addition ALL STATES and PROVINCES fall under FEDRAL gun laws for that country.
Know your laws and DO NOT become another anti-gun lobby statistic.
Above all believe that
A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.