Extensively discussed here:
For what it's worth, the prohibited models aren't any smaller than their 9mm cousins, so their market viability is questionable.
+1, and they're also blowback-operated rather than locked-breech, so it's highly unlikely that they shoot any softer than a similar-sized 9mm Glock, and may actually have more
recoil (hard to say exactly, since virtually nobody on this board has seen one, much less shot one). No size advantage + no recoil advantage + ammo price disadvantage
+ fails ATF points test = virtually no American market potential.
The G25 and G28 basically exist as specialty products for sale in countries that prohibit civilian ownership of pistols in so-called "military" calibers.