Weapon upgrades are purchased from the Duke using Lei. You can improve a weapon's Power, Rate of Fire, Reload Speed, and Ammo Capacity. Prioritize Power for increased damage and Ammo Capacity to reduce reloads. Custom Parts are unique attachments found throughout the game or purchased from the Duke. These provide significant bonuses, such as increased stability, reduced recoil, or larger magazines. Examples include the High-Capacity Mag for the LEMI or the Long Barrel for the M1897. Always equip custom parts as soon as you find them.
