I think people who buy a Scorpion and then complain about the lack of "drop-free" mags, as though it is some sort of fault or design-shortcoming of the gun, need to do a little homework and get a better understanding of the actual history of the Scorpion (and sub-guns in general, apparently). Expecting it to run just like an AR is like expecting a Glock to have the same MOA as a P226, and then complaining because the latter has a decocker. It's not a shortcoming of the Scorpion - it's how it was designed and intended to be used, and it's really no big deal to train to strip the mag and reload quickly at all; unless you are someone who mistakenly bought a Scorpion thinking it was going to be a direct crossover training tool for your AR, in which case, you probably should have done that homework before purchasing, rather than complaining about it after the fact.
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Gotta agree here whether the mags drop free or not, folks should ALWAYS train for every functionality scenario with their weapons. 
See my reply in his other thread. I have shoot several different semi variants of SMG (Vz-61, Sterling and AR9).
Allowing your mag to hit the ground does not seem like a wise course of action when stowing them only take a second.