Bob,
Pistols and pistol mags are all 10 rounds. The pistol caliber carbines use pistol mags thus limiting them to 10 rounds. Having a pistol caliber pistol will still be 10 rounds so no change.
OK I will try to be gentle in my reply.
There is a company in the US that makes a "pistol" based upon the AK 47 that uses mags that will fit the CZ Scorpian Evo Carbine. If the rule is as simple as you suggest the Evo would be allowed to have 10 rd mags just like the AR platform is allowed to use mags with pistol written on them because Smith & Wesson and others now make pistols with AR receivers. In the case of the AR of course the RCMP ignore the fact the AR platform ALSO is made in the US in select fire versions.
The RCMP have ruled that because the semi auto EVO is a variant of the select fire Scorpian it is limited to 5 rds. There is another PCC platform that is made in select fire versions EXACTLY the same as the Scorpian and that PCC is allowed to use 10 rd pistol mags. To add to the mix, while the AR 10 rd mags must have pistol written on them to be legally loaded to 10 rds the PCC, which will remain unnamed, enjoys 10 rd mags that do not have to have pistol written on them.
I am sure you knew all that or you would not have reminded me that pistol mags hold ten rounds and sometimes PCC's do and sometimes they don't even when two guns have exactly the same family tree.
Take Care
Bob
ps NOne of the above addresses the convoluted mess the rim fire boys face when it comes to semi-auto rifles. Some get 10 rd mags and some get as many as you can lift. Depends sometimes on how it looks while others...well it depends on what the weegee board came up with.
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