BLDB (Building Block), a D2C brand specializing in high-precision metal assembly models, began selling its Rebellion Core series on its Japan official online store on June 29, 2026. The lineup brings cyberpunk-themed 3D metal assembly kits that ditch the tab-fold fastening method common in metal puzzles, replacing it entirely with real screws and nuts across parts laser-cut from 1mm-thick stainless steel.
Three Features of Rebellion Core
1. Fully Screw-Fastened Structure
Most metal puzzles rely on thin brass or iron plates bent into tabs to hold pieces in place — a method prone to metal fatigue if bent incorrectly and that can leave the finished model feeling fragile. Rebellion Core eliminates this compromise: M1–M2 precision screws and nuts fasten every component, from the main frame down to the smallest internal gears. The tactile torque of tightening each screw is part of the experience, and the fully mechanical joints mean any part of the model can be disassembled and readjusted even years later.
2. 1mm Stainless Steel with Hairline and Sandblast Finishing
The kits use 1mm-thick SUS304 industrial-grade stainless steel, giving each completed model a noticeably solid weight. The surface alternates between hairline finishing and matte sandblast treatment to evoke the dystopian aesthetic of cyberpunk — when the cut edges catch desk LEDs or neon light, they scatter light in ways that give the model a distinct presence on a shelf or desk.
3. Internal Gear Drive and Bio-Mechanical Motifs
Rebellion Core models are not static display pieces. A calculated internal gear system allows the components to move, actuated manually or through an optional external unit. The current lineup includes motifs that blend mechanical and biological forms: a cyberpunk cyborg dragon, a scorpion, insects with wild organic shapes, and a V8-engine heart unit modified with cyber elements.
Product Details: Rebellion Core — Phantom Deep Sea Fish
Product name: Cyberpunk Mechanical Assembly Model "Rebellion Core: Phantom Deep Sea Fish"
Price: ¥43,475 (tax included, free domestic shipping) / Sale price: ¥33,443
Material: SUS304 stainless steel, some brass parts
Parts: Approximately 700 precision metal parts, screws, and nuts
Exterior thickness: 1.0mm
Completed dimensions: Approx. 250mm (L) × 100mm (W) × 200mm (H)
Estimated assembly time: Approx. 6–12 hours (advanced level)
Included accessories: Precision screwdriver, mini wrench, parts sorting tray, assembly manual with high-resolution 3D diagrams
Release date: June 29, 2026
Available at: BLDB Japan Official Online Store (https://bldb.jp)
Cyberpunk series collection: https://bldb.jp/collections/steampunk
Summer Campaign
A coupon code "SUMMER20" applied at checkout during the summer campaign period gives 20% off on the featured collection. Customers who post an unboxing video or assembly process on SNS and tag the BLDB official account (@BLDB) can also receive an additional 10% cashback by submitting a screenshot or URL to customer support via the live chat on the official site. The first 50 purchasers from the campaign page additionally receive a free microfiber maintenance cloth. All orders in Japan ship free.
Launch Commemorative Offer
From June 29 through July 15, purchases from the Japan official online store come with a complimentary limited "titanium-color custom screw set" (not available for purchase separately). The set lets buyers customize select exterior parts in a burned titanium blue finish.
