The "Gunpla Option Parts Set 18 (Build Booster Set)" is a highly anticipated addition to Bandai's High Grade Build Custom (HGBC) line, scheduled for release in November 2025. This set stands out by combining two iconic support units from the Gundam Build Fighters universe: the Build Booster and the Build Booster Mk-II. This set offers modelers a wide range of customization options for their 1/144 scale Gunpla, allowing them to recreate configurations from the animated series or explore new creative possibilities by combining parts.
Expand your Gunpla with the Build Booster Set, featuring new parts and weapons.
Product Information
- Price: 1,210 JPY (tax included)
- Release Date: November 2025
- Scale: 1/144
- Series: Gundam Build Fighters
- Line: High Grade Build Custom
- Product Type: Regular Sale
Front and rear views showcase the complete Build Booster unit from the Option Parts Set.
Features
A key feature of both units is their transformation capability. Both the Build Booster and the Build Booster Mk-II can convert from an independent support fighter form to a backpack form that attaches to a Mobile Suit. The set is designed for wide compatibility, including various joint parts that allow it to be attached to different Gunpla. Furthermore, modularity is a key aspect: the parts from each section of the boosters can be disassembled and used individually as weapons or customization elements, encouraging experimentation and "kitbashing."
The Build Booster Mk-II from Option Parts Set 18, shown in front and rear angles.
Contents
- Parts to assemble the Build Booster
- Parts to assemble the Build Booster Mk-II
- Set of joint parts
Support Units and Context Summary
The set's relevance stems from its origin in the series Gundam Build Fighters, an anime set in a world where "Gunpla Battles" are held, virtual combats where modelers pilot their customized creations.
The Build Booster attached to a mobile suit, transforming into a backpack.
Build Booster (BB-01)
This is the custom support unit and backpack for the GAT-X105B/FP Build Strike Gundam Full Package. It not only enhances the Mobile Suit's maneuverability but also provides additional weaponry. It was created by Sei Iori, a talented builder and Gundam connoisseur, and primarily piloted in battle by Reiji, an enigmatic young man with exceptional piloting skills. The Build Booster is based on the Striker Pack system of the GAT-X105 Aile Strike Gundam from Mobile Suit Gundam SEED.
Build Booster Mk-II
This unit is the transformable backpack designed by Sei Iori for the RX-178B Build Gundam Mk-II, a custom Gunpla based on the RX-178 Gundam Mk-II from Mobile Suit Zeta Gundam. Like its predecessor, the Build Booster Mk-II can switch between a fighter form and a backpack form, and its components integrate with the Mobile Suit's weaponry.
A custom mobile suit equipped with the Build Booster Mk-II backpack and rifle.
Both boosters are examples of how the characters in the series adapt their Gunpla to gain tactical advantages, reflecting the spirit of the Gunpla hobby in the real world.
Sources
- "オプションパーツセット ガンプラ 18 (ビルドブースターセット) | バンダイ ホビーサイト." Bandai Hobby Site. Accessed June 7, 2025.
- "Option Parts Set Gunpla 18 (Build Booster Set) | HLJ.com." HobbyLink Japan. Accessed June 7, 2025.
- "GUNDAM BUILD FIGHTERS | MG 1:100 BUILD GUNDAM Mk-II." GUNDAM.INFO. Accessed June 7, 2025.
- "GAT-X105B/ST Star Build Strike Gundam – MAHQ." Mecha Anime HQs. Accessed June 7, 2025.
- "GUNDAM BUILD FIGHTERS | Sei Iori." GUNDAM.INFO. Accessed June 7, 2025.