There are optimal positions for players to install guard towers, such as:
- Open spaces where a majority of your prison population will pass through daily.
- Near open yards where a majority of your prison population will go to.
- In and around the entrances and exits to your prison.
- At the perimeter of your prison.
From a guard tower, a sniper's maximum range is 48 blocks.
When freefire is off, violent or escaping prisoners in the Guard Tower's vicinity will be first marked with a red laser by the tower and given a chance to surrender, if they surrender they will be taken into custody by guards. If they continue their violence then a guard tower will fire a single shot at the prisoner, either killing the prisoner or making them go unconscious.
When freefire is on, violent or escaping prisoners in the Guard Tower's vicinity will be shot instantly by the tower, either killing the prisoner or making them go unconscious.
Guard towers will only react to incidents and prisoners outside (not within a prison foundation) so are not functional in communal indoor areas such as canteens.