Concussion cannon

Living up to his name, Breakdown totes a concussion cannon that instantly causes mechanical failures in whatever it hits. While the vibrations from his engine have the same effect, he can pick off his targets more easily with this gun, and it's more potent. But that's what they want him to think. When he turns his back, they'll get up again, devour his spark, and make him one of them!!

Only marginally more pleasant to encounter is Over-Run, whose Attack Copter transforms into a concussion cannon emplacement. Also the cannons can fire magnetic missiles. Because that's just how Over-Run rolls.