Gun Crusher

To hold back Kundun's armies, the MU Empire quietly formed the Imperial Corps. Its agents took a healthy boy named Fisher from Goa and put him through brutal training until he lost his old self and became a loyal soldier of the Empire. Named a Gun Crusher, his first mission sends him to Elbeland to wipe out monsters.

His gun deals magic damage, so its numbers are listed as Wizardry and his gear asks mostly for Energy. He starts in Elbeland and forms a set party with the Rune Mage and the Grow Lancer.

All of his attack skills are his own. Three are sold by the NPC Marce in Elbeland and two by James, who takes Ruud:

A later update gave him a buff, Fixed Fire, sold by Marce at Elbeland (36, 218) and learned with 300 Energy. It lowers defense a little but raises attack speed and Wizardry; right-click its icon to turn it off. In the Master Skill Tree, Fixed Fire Strengthener (up to 20 points) adds Wizardry and Fixed Fire Mastery (up to 10) adds attack speed while the buff is on.

After the 4th advancement, the Skill Enhance Tree has branches for Dark Plasma (debuff: Poison or Freeze), Ice Blast (Freeze or Poison; one option even removes its cooldown) and Bursting Flare (Bleed or Poison), each with more damage, range, area or targets.

His guns go from shop items to socket guns at 380-400 and then the mastery line (shortened table):

He can wear the Leather, Scale and Round Gunner sets and his own Frere set. Socket sets are Titan Gunner (level 380) and Stormwing Gunner (level 400). His mastery sets come in four pieces: helm, armor, pants and boots, with no gloves.

His Lv. 4 Wings are the Wings of Bloodshed: 4th advancement and level 800, Wizardry 100, defense 140, +55% damage and 43% damage absorption, with up to 4 random wing options.