Apparently the herakles weapons are bugged, and theres some.. oddities with the perk you unlock..
the melee weapon shows the bow perk, the bow shows the melee weapon perk, when they're supposed to be swapped, the appropriate perk unlocks when you gather them though
also it's odd that a weapon perk is unlocked for the chest slot, which is.. strange, but I'm not complaining, bc I wouldn't put anything else there anyways (40% dmg when above your enemies is perfect for my build, once I finish gathering my armor as I want it I should be within range to get one shot kills without skills on most non-elite enemies)