[LucianOfSamasota]

Not that many smg’s in .40 S & W?

Heckler & Koch MP5
Heckler & Koch UMP

Does anyone know of another?

.40 S & W to stock same caliber as handguns?

[Myrddin]

I recall a buy of 2 billion rounds of .40 S&W JHP. Perhaps they realized that a submachinegun would more effectively deliver that inventory to the domestic targets (since JHP is forbidden for use in military conflicts).

[TurboZamboni]

KRISS?