Shotguns, a sniper rifle, baton, body armor and tazers can be seen, however as of Alpha 30, only the shotguns, tazers and armor can be used. Pistols also exist in game, but cannot be used by guards. However, they can be stolen and used by prisoners during a riot.
The prisoners in a riot will target the weapons rack for weapons to help escape.
Guards who lose their batons in a fight can only get a new one here