This article is about a/an episode in Kamen Rider Build.
Red alert WARNING: This episode contains scenes of blood, bloodshed and murder. Viewer discretion is advised!

The Weaponry Hero (兵器のヒーロー Heiki no Hīro) is the sixteenth episode of Kamen Rider Build. It features the debut of Build's KaizokuGatling Form. Kamen Rider Grease makes a brief appearance in this episode, after his appearance in Kamen Rider Heisei Generations FINAL: Build & Ex-Aid with Legend Riders, as well as Akaba, Aoba and Kiba.


Gentoku’s words brought doubt to Sento’s ears! The fact that Sento is actually the demonic scientist himself has really brought him down. He keeps repeating to himself that he was the one who experimented on humans and created the monsters called Smash. Sento starts to fill with guilt. However, Ryuga speaks his mind. He knows he cannot continue to fight alongside him if he knows he was the scientist behind the technology that killed his girlfriend. Ryuga summons Sento to him by saying… “Fight me”…


to be added


Guest Casts

Suit Actors

Forms and Collectibles Used


  • Bottle used:
    • Build
      • Biotic: Kaizoku, Taka, Ninjya, Rabbit, Gorilla (in Drill Crusher), Octopus
      • Abiotic: Gatling, Comic, Tank, Light
      • Other: RabbitTank Sparkling
    • Cross-Z
    • Blood Stalk
      • Biotic: Cobra
      • Abiotic: N/A
    • Castle Hard Smash
      • Castle
  • Form used:
    • Build
      • KaizokuGatling Form, RabbitTank Sparkling Form, HawkGatling Form, NinninComic Form, RabbitTank Form, OctopusLight Form


  • Jelly used:
    • Grease
      • Robot


  • When Blood Stalk throws the knife at Taro Satou that kills him, the knife's final location is seen on the wall instead of on Taro's back.
  • It's unknown how Build recovered the Octopus and Light Fullbottles as they were in Soichi's possession at the time.


Build EP1 CS
  • Closing Screen Fullbottles:
    • Kamen Rider: Build
    • Fullbottles:
      • Biotic: Rabbit
      • Abiotic: Tank
  • Count at episode end
    • Bottles in Build's possession:
      • Biotic: Rabbit, Gorilla, Taka, Ninjya, Panda, Harinezumi, Lion, Kaizoku, Octopus
      • Abiotic: Tank, Diamond, Gatling, Comic, Rocket, Syoubousya, Soujiki, Densya, Light
      • Other: RabbitTank Sparkling
    • Bottles in Cross-Z's possession:
    • Bottles in Night Rogue's possession: Bat
    • Bottles in Blood Stalk's possession: Cobra
    • Bottles in Castle Hard Smash's possession: Castle
    • Bottles in Stag Hard Smash's possession: Kuwagata
    • Bottles in Owl Hard Smash's possession: Fukurou
    • Bottles in Hokuto's possession:
      • Biotic: Wolf
      • Abiotic: Smapho
    • Jellies in Grease's possession: Robot
  • This is the last Build episode airing in 2017.
  • The third time Sento Kiryu narrates the recap by himself.
  • This episode mark the last appearance of OctopusLight Best Match.

DVD/Blu-ray releases

External links


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