MGUniversal Century

Gundam RX-78-2 Ver.1.5 HGUC Design Parts: Arm Parts Set

A resin side quest for Ver.1.5 owners who want their forearms to look like the poster art instead of the 2000 kit.

MechaGrade Score

3.2/5

RX-78-2 Gundam · 1/100 · 2002

GradeMG

Scale1/100

Released2002

Runnersn/a

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The verdict

This is not a kit you build for the fun of building it, it is a fix you buy because something about the stock MG Ver.1.5 forearms bothered you enough to go looking for B-Club's answer.

I respect what it is doing more than I enjoy doing it. It reshapes the forearms toward the leaner, more HGUC-influenced silhouette fans wanted after the boxy original 1995 MG, and it does that job, but it asks for resin-kit patience the base kit never asked for.

Best for: MG RX-78-2 Ver.1.5 owners doing a proportion fix or diorama build who already have resin experience

The full review

What it is

This is a B-Club arm conversion set (item 2169, released March 2002) made specifically to slot onto the MG RX-78-2 Gundam Ver.1.5, the 2000 update to Bandai's original 1995 Master Grade. It is one of a small companion trio, alongside separate HGUC Design body and waist parts sets, all aimed at nudging Ver.1.5's proportions closer to the leaner HGUC take on the RX-78-2 that fans had come to prefer. Picking it up feels less like buying a model and more like buying a very specific opinion about forearm shape, which is charming if you share that opinion and baffling if you do not.

The catch

It is a B-Club release, which means resin, not injection-molded styrene, so there is no snap-fit satisfaction here. Expect casting seams to clean up, test-fitting against your Ver.1.5's actual arm frame before committing glue, and painting from scratch since resin carries no molded color separation the way the base kit's runners do. It has been out of production for years and turns up rarely and inconsistently priced when it does, so sourcing one is its own project. Documentation and build logs for this specific set are thin online, so going in you are largely on your own for reference.

Who it's for

This is for someone who already owns and likes the MG Ver.1.5, has resin conversion experience or is willing to learn it on a low-stakes part, and specifically wants the HGUC-influenced forearm silhouette rather than the stock Ver.1.5 shape. It is not for a first Gunpla, not for anyone wanting an out-of-box display piece, and not worth chasing down if you just want a good-looking RX-78-2, the modern HGUC Revive or a Ver.Ka MG gets you there with zero resin work. If you are the kind of builder who already has putty and sanding sticks on the bench, this is a fun afternoon detour. If you are not, skip it and enjoy Ver.1.5 as Bandai shipped it.

The build story

What the build is actually like, and the engineering worth knowing about.

Treat this like any small resin garage-kit add-on rather than a styrene kit. Casting seams need scraping or sanding before anything test-fits cleanly, and because it is meant to graft onto an existing MG Ver.1.5 arm frame, dry-fitting against your specific kit before gluing is not optional, tolerances on decades-old resin runs vary kit to kit.

The actual engineering idea is sound: reshape the forearm exterior to read closer to HGUC proportions while the Ver.1.5's existing inner frame and elbow joints keep doing the articulation work underneath, so you are not losing the poseability that made Ver.1.5 notable for its era. Since it is unpainted resin, color separation and the finished look depend entirely on your own paint job, there is no shortcut here the way there is with a modern pre-colored runner.

Lore & trivia

01B-Club began as a Bandai hobby magazine in 1985 before the name became Bandai's in-house line for limited resin kits and conversion parts for existing Gunpla.
02This Arm Parts Set (B-Club 2169) shipped alongside a companion HGUC Design Body Parts Set (B-Club 2168), both built specifically to work with the MG RX-78-2 Ver.1.5.
03The MG Ver.1.5 it modifies was Bandai's 2000 update to the original July 1995 MG RX-78-2, adding reworked head, chest, shoulder, elbow and leg parts plus new Gundam Hammer and Beam Javelin weapons.
04Ver.1.5 introduced a leg runner with an integrally molded damper joint, an early step toward the pre-colored, pre-articulated inner-frame runners that would later define the Real Grade line.