Both of those items cant be exported. A) mags are not pinned to 5 prior entering Canadian soil. B)Brownells respects the Canadian distribution right of the importer as such, they will not export any Magpul products.
As far as regular export goes, if your order does not includes any major firearm component; ( barrels,receivers ),brass or bullets or any SME items; ( muzzle brake, flash suppressors) compensators are in a grey area, and the manufactures of said products has been registered with the DOS then the item(s) can be exported. Any non-regulated items/gun components can be exported to Canada with an order maximum of no more than $500USD.