Friction rifle
Runamuck considers wreckage to be fine art; he creates "art" of his own with his friction rifle. It greatly increases the effects of friction on its targets so the slightest movement can have deadly effects as the friction between their bodies and the molecules of the air can make them burst into flame or even melt. Its effects last for up to five minutes.
Fiction
Marvel The Transformers comics
Runamuck was unable to hit Circuit Breaker with his friction rifle. If he had, it would've heated up her molecules and made her explode. Big mess!
Runamuck loves a big mess. Decepticon Graffiti!
Later, a shaky Runamuck tried to make a big mess out of an angry Scorponok with his trusty friction rifle. The only mess made was running down Runamuck's legs as his royally-pissed ex-leader somehow shrugged off having his molecules set on fire and beat the crap out of him. ...All This and Civil War 2
Dreamwave Generation One continuity
While investigating Shockwave's secret lab, Runamuck gleefully toasted a hapless Mini-spy with his friction rifle. Night of the Combaticons
Animated cartoon
Omega Supreme packs a friction cannon which works on the same principle as Runamuck's weapon does. While it made a big mess out of enemy Decepticons, Omega probably doesn't enjoy it as much as Runamuck would've. AllSpark Almanac
Prime toy bios
Flamewar wields a friction rifle.
