I didn't even get into long guns.
First Agency: Remington 870s (18" or 20" barrels for perimeter and CERT, 32" barrels for towers) and Mini-14s in the towers.
Now: Remington 870s (18" barrel with side-saddle), and Colt 9mm SMGs. DCT has M4s and M16A1s.
"Opportunity is missed by most people because it comes dressed in overalls and looks like work." -- Thomas Edison