01-31-2012, 06:02 PM
You bring a gun that has sentries in it. You push the fire button and you poop one out onto the ground. From there it starts shooting people that get too close. They never go away until they've been blown up and never run out of ammo. Very useful. Your FCS determines how many you can have out at once. If you lay more than you can handle the oldest one dissappears.