I have a few 11 round pistol mags, that have a metal rod epoxied to to the back of the follower in order to limit them to 10 rounds. I suspect that if someone wanted, they could break off the epoxied pin or replace the follower in a couple of minutes. Mags were bought from Wolverine Supplies, so I doubt that they are pinned incorrectly. So epoxying a rod to the back of the follower is a legal option (might not be practical if the mag is much longer then the limit you're pinning it to).
You are admitting to being in posession of a prohibited device. Feel free to correct me if Im wrong.
Possession of prohibited device... Man. Why does this even come up? Truly, gun owner community is it's own worst enemy.
Someone I know owns a bunch of unpinned 30 round mags for Swiss Arms. Is he breaking the law and in possession of prohibited device? Not in Switzerland, where he lives.
At the local gun show in the fall, one of the dealers had about a dozen of unpinned 30 round AK-47 mags. Was the dealer breaking the law? Maybe, but it's not for me to say. I didn't report to anyone that the fellow has a bunch of femicidal high capacity implements of mass destruction. Owner is an adult, why should I supervise him?
And not like it's uncommon for someone to inadvertently become in possession of a prohibited device - look how many Beretta CX4 Storm owners received a 10 round mag marked "CX4 Storm". Looks just like Beretta 92 mag, just has the wrong logo engraved on the mag. RCMP had to issue a special bulletin regarding the matter.
I am griping because a question was asked on how to properly pin mags, nothing else.
Not on legality of a mag someone might or might not have. We don't know the circumstances, maybe the mag is not in Canada, or maybe he accidentally got sold a mag that wasn't pinned, or maybe the rivet popped out. Or maybe this is a hypothetical question, and mags in question weren't even bought by the person yet.
So maybe we should be answering the question (and most replies did), instead of trying to pass judgement, especially since we don't know the whole story.