The Repulsion Turret emits a barrage of Plasma Force Fields, which apply an extreme amount of force to anything it comes into contact with. Although completely immobile the turret is protected by a barrier when inactive, and the huge amount of Plasma Force Fields it emits can't be shot through.
— Miner's Manual Description.
The Rival Repulsion Turret is a stationary defense from Rival Tech. They appear on Industrial Sabotage and in missions with the Rival Presence mutator. If a dwarf comes in range and also enters it's Line of Sight (LoS), it will activate and begin to rotate erratically both clockwise and counter clockwise in a staggered pattern, coming to a halt after each rotation to emit a burst of it's force fields in accordance with the direction it's glowing Weak Points are facing before resuming it's rotation. Breaking LoS will cause the Repulsion Turret to fire off a few more waves of plasma before it de-activates back into it's passive state.