The Colorado House just passed a bill limiting magazine capacity.
I have purchased six "high capacity" magazines for my Para. I've used them for years at Defensive Pistol. They are high capacity, in that they hold TEN rounds, instead of the standard seven (or eight, I don't remember, it's been so long since I've used my standard magazines).
Jay's M&P comes with 17-round magazines, standard. Not high capacity. Those are the ones that came with his gun. You know, standard capacity.
However, under the bill just passed by the Colorado House, my non-standard, high capacity magazines will be legal, while Jay's standard capacity magazines will be illegal.