Weapon Abilities - Synthlight/MHW-Editor GitHub Wiki
Special Ability ID
from certain weapons (.wp_dat/_g) is an index to an external file:
wep_glan.wep_glan
Gunlance: Shell Type/Level
wep_saxe.wep_saxe
Switch-Axe: Phial Type/Amount
wep_whistle.wep_wsl
Hunting Horn: Note 1/2/3
wep_wsword.wep_wsd
Dual Blades: Multi-Element Damage/Type