Friction rifle

The friction rifle is a weapon from the Generation 1 continuity family.

Runamuck was sold on this gun as soon as he heard 'friction between bodies'.

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 Comics continuity

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. The only mess that was made was running down Runamuck's legs as his royally pissed-off 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 comics continuity

While investigating Shockwave's secret lab, Runamuck gleefully toasted a hapless Mini-spy with his friction rifle. Night of the Combaticons