PDWs...and other small arms.

[stanc]

As we are now well into the 21st Century, I see a lot of old school designs with new packaging on them, often based on the AR15 receiver arrangement, but chambered in uninspiring 9mm...

IIRC, back around 2005 the Commandant's Notes in Infantry magazine called for use of SBR versions of the M4 carbine (like the Navy's 10-inch barrel Mk18) to be used as a PDW.