Slowest
.22LR

I've never left anything oem as far as I know, so ordered some goodies for my spankin' new Patriot 590 Shockwave.
Defender Tactical bits:

Monstrum laser w/pic rail:


Sighting in the laser at the backyard range:

NDZ safety, opted for the wider version, easier to modulate gloved up.

GG&G QD for a sling.