Concussion weapon

Concussion weapons cause the bulk of their damage through sheer physical force. For whatever reason, they appear to be used almost exclusively by Decepticons. Soundwave uses a concussion blaster with its own adorable battery altmode. Horri-Bull can hit targets over twelve miles away with his.

Ransack uses a high-intensity concussion blaster when he isn't eating, kicking, shredding or shocking his enemies, and Sixshot wields a pair of similarly amped-up hypersonic concussion blasters, which presumably use soundwaves to do their job.

Razorclaw has a twin concussion blaster that knocks his opponents down with capsules that add injury to injury by releasing a volatile gas.

Perceptor bucks the Decepticon trend, using a concussion rifle when he finds himself facing a problem without a solution in the back of the textbook. Living up to his name, Breakdown totes a concussion rifle 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.

Finally, they aren't guns, we're afraid, but Dirge's air-to-air concussion missiles still pack a big kinetic punch, as do those of Blitzwing's fighter mode. Bonecrusher can mount an optional concussion bomb launcher on his bulldozer form to help him break stuff, while Powerglide prefers to drop his from the sky.