Life Inc. has mounted various lemonguns around Lifeton. There are 3 main types.
Spirecannons: the canons around the top of the Life Inc. HQ they shoot lemons from on Lemon Day.
Squirt Guns: they shoot lemon juice, aka a mild acid, and can make it literally rain acid across the town, often leading to eye pain.
WallGuns: they are mounted on the wall/fence the surrounds the town aimed in and out to prevent slaves from escaping and the military from entering, they clearly only work when stopping slaves from escaping because the military doesn't give a fuck about a few fast lemons.
Lemontank: it's a straight up tank, specifically a PT-76. They have 12 of these.