1/144 Option Parts Set Gunpla 18 (Build Booster Set)

Description

The Bandai 1/144 Option Parts Set Gunpla 18 (Build Booster Set) is an accessory/expansion kit released by Bandai Spirits in November 2025 (Japan release around November 22, 2025, with international stock following shortly after). It is part of the Option Parts Set line for 1/144 Gunpla (primarily HG, RG, and EG kits), providing modular boosters inspired by the Gundam Build Fighters series.

This set is a re-release/combined edition of the classic HGBC-001 Build Booster and HGBC-003 Build Booster Mk-II — now bundled together in one package for convenience, allowing builders to equip their Gunpla with fighter-mode or backpack-mode boosters for dramatic customization and display.

The kit is snap-fit (no glue required), pre-colored for a clean out-of-box finish (primarily white/gray with blue/red accents and metallic details), and features excellent 3mm joint compatibility for attachment to any 1/144 Gunpla backpack, shoulders, or weapon mounts.

Key Features

• Build Booster — Classic fighter/backpack hybrid: transforms between jet/fighter mode (for "boosted" flight poses) and backpack mode (for mounted power-up on Gunpla).
• Build Booster Mk-II — Upgraded version with refined design, additional thrusters, and more aggressive styling; also transforms between fighter and backpack modes.
• Modular Joints — Extensive 3mm connection points on boosters — attach to backpacks, shoulders, arms, or weapons for endless custom combinations (e.g., dual boosters, hybrid fighter/backpack setups, or multi-unit "super boost" effects).
• Details — Sharp molding of thrusters, vents, and mechanical textures; foil stickers for markings, vents, and accents (panel lining enhances the "powered-up" look).

Included Items

• Build Booster parts (full fighter/backpack transformation)
• Build Booster Mk-II parts (full fighter/backpack transformation)
• Joint adapters/connectors (for secure mounting on various Gunpla)
• Foil sticker sheet
• Instruction manual (pictorial steps with transformation and combo guides)

This kit is a dream for Build Fighters fans or customizers who want to give their Gunpla dramatic "boost mode" looks — the dual boosters (original + Mk-II) allow for wild combinations (e.g., double boosters on HG/RG Freedom, Strike, or Wing Gundam for "super flight" poses). Builders praise the transformation stability, value (two boosters in one set), and how it instantly upgrades any 1/144 kit. Pair it with HG/RG Gunpla (e.g., Build Strike, Exia, or custom builds) for Build Fighters-style displays!