You may have an incorrect assumption there, the pistol version uses rifle mags, the rifle came first so mags are 5 rd. Now if you have a pistol mag that fits (XCR-L or LAR 15) then you would be good with a 10 rd mag, at least currently.
As for the Scorpion I requested she used standard CZ pistol mags (ten rd) but CZ were not interested, money talks and our market simply does not generate enough money.