Something is definitely up. They appear to be on a very high alert notification. When Al came back they only had side arms holstered and now they are armed to the teeth. This can only be on an order from their commander. The council may or may not be so aware. Allgood or one of his cronies could have stirred up some hysteria to make them take such extreme measures. Its almost as if they are expecting an attack, not from topside, but from Endtown.To answer Bob I am not sure of the caliber but I have seen when they took down Maude and Linda those bullets will rip a door to shreds. Based on their size a 5.7×28 would work well. Small pistol size cartridge but very powerful. They are not caseless as when they shoot Aaron has always showed brass flying. The FN 5.7 uses such a cartridge. So does the P90 which is popular with Spec Ops, SAS, police tactical units. The pistol is no larger than a Berretta 9mm but holds twenty rounds. The P90 can hold up to 100 rounds in a top loading mag. The rats have regular mags. 400 yrd range (that is just max effective due to accuracy of the weapons) and able to shred tactical body armor and Kevlar helmets. But just guessing using our worlds armory.Now I know the muzzles look really BIG but have you ever looked down the receiving end of a weapon?(Walt is) I have and believe me a 9mm looks like a 12ga when it is aimed at you.