So much naivete and ignorance about this subject, so I figure I would enlighten some people. [b]firefly:[/b] a precision kill will cause that enemy to explode and cause ADDITIONAL damage to enemies nearby. [b]explosive rounds:[/b] REDUCES the amount of damage PER ROUND and turns that LOST damage to an area of effect blast. Kills with the explosion DO NOT activate the firefly ability. TLW: If you want to use your fatebringer, or any weapon with firefly, do NOT have explosive rounds active or else you lose your firefly additional blast damage because enemies start dying from the explosive damage, not the precision damage. No precision kill means no firefly explosion.