were concealing them and using them in criminal acts
Then ban the concealment and use in criminal acts - just as the Parker verdict observed. Prohibition of mere ownership is not warranted ... especially when modern militaries have discovered that sub-18" barrels ARE particularly useful.
Does that mean the weapon bears some reasonable relationship to the preservation or efficiency of a well regulated militia? Do you expect me to believe that a weapon used for riot control is an ideal weapon for combat?
I mean, why else mention that Mossberg sells a lot of the 14" ones to police & military?