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Gun Gun (ガンガン, Gangan; Viz: Blam-Blam) is the B-Class Rank 43 professional hero of the Hero Association. He is a gun enthusiast.[1]


Gun Gun wears a cowboy outfit that consists of a brown cowboy hat, a yellow bandana tied around his neck, and a mask. Like a true cowboy, he wears a bandoleer to carry his two revolvers and bullets.


Human Monster Saga

Monster Association Arc

He is one of the B class heroes who joins Death Gatling to capture Garou when he was injured.

During the fight with Garou, he tries to shoot Garou with his revolvers but none of them hit. To make matter worse, due to his lack of close combat capabilities, he has to keep the distance between himself and Garou as well as relying on close combat specialists like Stinger and Smile Man to deal with Garou in close range.

When Garou was about to pummel Wild Horn, he manages to shoot Garou in the left leg and corner him with others heroes.[2]

However, after Garou manages to defeat Chain'n'toad by using Smile Man's own attack, he tries to shoot Garou, but Garou blocks his bullet with Chain'n'toad's sickle. He is later defeated when Garou launches Smile Man's kendama ball at him, knocking him out cold.

Abilities and Power

Gun Gun is one of the best heroes in term of precision.[3] He performs best at medium range confrontations. However, his melee combat is quite weak, forcing him to finish opponents fast before they can get close to him.

Physical Abilities

Enhanced Reflexes: Gun Gun is capable of keeping track of an injured Garou and relatively predict where he will be so he can shoot him.[4] 

Fighting Style

Expert Marksman: Gun Gun is incredible at sharpshooting. He is capable of firing in quick succession.[5]

  • Joint Shooting (関節撃ち, Kansetsu Uchi): Gun Gun fires two revolvers at the same time.


Dual Revolvers: Gun Gun carries dual revolvers in combat.


  1. One-Punch Man Manga; Chapter 81, page 8
  2. One-Punch Man Manga; Chapter 81, page 28
  3. One-Punch Man Manga; Chapter 81, page 8
  4. One-Punch Man Manga; Chapter 81, page 19
  5. One-Punch Man Manga; Chapter 81, page 18


Hero Association
S-Class 1. Blast • 2. Tornado of Terror/Tatsumaki • 3. Silver Fang/Bang • 4. Atomic Samurai/Kamikaze • 5. Child Emperor • 6. Metal Knight/Bofoi • 7. King • 8. Zombieman • 9. Drive Knight • 10. Pig God • 11. Superalloy Darkshine • 12. Watchdog Man • 13. Flashy Flash • 14. Demon Cyborg/Genos • 15. Metal Bat/Bad • 16. Tanktop Master (Tank Topper Army) • 17. Puri-Puri Prisoner
B-Class 1. Blizzard of Hell/Fubuki (The Blizzard Group) • 2. Eyelashes • 3. Mountain Ape • 6. Wild Horn • 7. Caped Baldy/Saitama • 20. Glasses • 25. Pink Hornet • 29. Double Hole • 39. Smell Master • 39. Reclusamurai • 43. Gun Gun • 49. Butcher • 50. Jet Nice Guy • 60. Needle Star • 65. Piko • 69. Crying Man • 70. Trap Tengu • 71. Captain Mizuki/Mizuki • 74. Lily of the Three Section Staff/Lily • 77. Bone • 81. Tanktop Black Hole • 93. Mushroom • 99. ShooterDarkness BladePineapple
Undetermined Class Tanktop GirlTanktop RockabillyTanktop RacerTanktop Al DenteTanktop SwimmerTanktop JungleTanktop MaskTanktop HatterTanktop DoctorPandaman
Staff Members AgoniBearded WorkerBespectacled WorkerC Branch OperatorConsole OperatorExecutive GirlGuichesMain Branch OperatorMcCoyNarinkiSekingarShelter Nr. 7 GirlSitchSome Important GuySpecial Committee GirlZ Branch Committee GirlZ Branch OperatorZeimeet