Menacing Shot, what's the duration?

[Barachiel Shina]

Menacing Shot says it functions as the Fear spell.

Meaning if the enemy passes the save, they're still Shaken for 1 round.

But if they fail, they flee in panic for 1 round/caster level.

But Gunslingers don't have a caster level. Am I to assume the enemy is in panic for 1 round/class level then?

[maouse]

Yeh, Ex ability - so it's not even a spell like ability or magical (SU) ability. But generally, when it acts like the spell and the spell says "1 round/level or 1 round" the level is the Class Levels instead of Caster Level (levels in Gunslinger, since it originates from that class). No, there isn't really RAW to cover this, per se, explicitly. Fortunately the Fear spell says "level" and not Caster Level... so there is that...