There would be a potential case too if you had to modify the magazine, (bending in the lips to hold the 9mm rounds) you would be creating a prohibited device.
I'm not trying to spark an argument, but for my own reference are you sure about that? As long as a pistol magazine is pinned/blocked to hold max. 10 rounds of whatever caliber it's marked on it, I don't think bending the feed lips would not make them prohibited. (?)
you asked a question you got your answer but seem you don't like the answer so now your hoping that some one will post one that you will like 
I'm not trying to spark an argument, but for my own reference are you sure about that? As long as a pistol magazine is pinned/blocked to hold max. 10 rounds of whatever caliber it's marked on it, I don't think bending the feed lips would not make them prohibited. (?)
I did say potential case.
There are varying thoughts on this.
Would depend on:
If an Officer thought your mags were a prohibited device, and they seized them, and then pressed charges, and the prosecutor followed through with those charges, then you'd be in the boat of proving otherwise to a court.
Sorry. I didn't state it to open the can of worms, but I know how I'd bet my money.
I'm not a legal professional and don't work with the criminal code though so take that for what it is worth.
5. Magazines for semiautomatic handguns which contain more than ten (10) rounds of a different calibre
Magazines designed to contain centrefire cartridges and designed or manufactured for use in a semiautomatic handgun, are limited to 10 cartridges. The capacity is measured by the kind of cartridge the magazine was designed to contain. In some cases the magazine will be capable of containing more than 10 rounds of a different caliber; however that is not relevant in the determination of the maximum permitted capacity.
Example:
Heckler and Koch P7 pistol chambered for 9mm Luger caliber:
The magazine designed for the 40 S&W calibre variant of the pistol will hold 13 cartridges of 9mm Luger calibre and function in the 9mm Luger calibre P7 pistol. This is permissible as the maximum permitted capacity of the 40 S&W calibre magazine must be measured by the number of 40 S&W calibre cartridges it is capable of holding, which is 10 such cartridges in the case of the HK P7 pistol magazine.
There would be a potential case too if you had to modify the magazine, (bending in the lips to hold the 9mm rounds) you would be creating a prohibited device.
You have altered the magazine to hold the 9mm rounds thereby creating a prohibited device.
You have altered the magazine to hold the 9mm rounds thereby creating a prohibited device.
You have altered the magazine to hold the 9mm rounds thereby creating a prohibited device.




























