Anti-Unstoppable

Anti-Unstoppable describes a weapon's ability to stun Unstoppable Champions. In The Edge of Fate the artifact mods let Hand Cannons, Sidearms (and Sniper Rifles) load an Unstoppable payload after aiming down sights for a moment, shown as a glowing red barrel, and exotic intrinsics and subclass verbs (Ignite, Suspend, Blind) can also stun them. Caveat: the exact "Anti-Unstoppable" label in older seasons wasn't verified from the sources used.