RGUniversal Century

RX-78-3 G-3 Gundam

The RG RX-78-2 engineering in a moodier grey coat, and honestly the better looking of the two.

MechaGrade Score

4.2/5

G-3 Gundam · 1/144 · 2015

GradeRG

Scale1/144

Released2015

Runnersn/a

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The verdict

This is the RG RX-78-2 skeleton doing the same excellent job it always does, just repainted into the color scheme Tomino wanted in the first place.

I came away impressed with how much motion Bandai packed into a 1/144 frame that still snaps together without glue. The grey and dark blue read as more serious and more mobile-suit than the primary-color original, and that alone makes it worth a look if you already have the standard RX-78-2 on your shelf.

Best for: RG builders who already own the RX-78-2 and want a moodier, lore-flavored variant with the same trusted inner frame

The full review

What it is

The G-3 is built on the same Real Grade advanced MS joint frame that made the original RG RX-78-2 a big deal when it landed, so you get a genuine inner skeleton under the armor instead of the usual simplified RG shortcuts. Mine went together fast and felt purposeful the whole way through, ball joints in the shoulders and hips clicking into place with a satisfying bit of resistance. The dark grey and blue over G-3 white feels like the suit Tomino originally pitched before the toy company asked for primary colors, and once it's built that read comes through immediately. It looks quieter and more like actual hardware than the RX-78-2 does sitting next to it.

The catch

Nub marks on RG runners are on the larger side and this kit is no exception, so budget real time for cleanup if you want clean panel lines, especially on the white and grey armor where a stray nub scar shows. Some builders report the head Vulcan units don't sit quite flush against the surrounding armor out of the box, a known quirk carried over from the base RX-78-2 mold. A few of the smaller armor shields have also been reported to pop loose during posing until you've handled the kit a bit and learned where the friction points are; a dab of thin double-sided tape or glue on those spots solves it for good.

Who it's for

Grab this if you already like the RG line's fiddly, reward-heavy build style and want a second RX-78 that doesn't look like a repaint job sitting next to your first one. It's also a nice pickup for anyone chasing the G-3's own UC lore rather than just wanting another red-white-blue Gundam. Skip it if you found the standard RG RX-78-2 too small or too nub-heavy to enjoy, because the frame and the cleanup demands are identical here. New builders should start with an HG or EG first; this kit rewards patience more than it teaches technique.

The build story

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

The runners are dense and the parts small, so cleanup takes patience, particularly around the shoulders and the skirt armor where nub scars are easy to spot on the lighter grey. Once the frame is together it locks in with confidence, and I never felt like a joint was going to strip out on me the way looser HG joints sometimes do. A couple of the smaller armor shields needed a light push to stay seated during posing, which lines up with what other builders have flagged about this frame.

This is where the RG engineering earns its reputation. The waist rotates, the thighs swing forward and back on a peg-and-socket setup and can flare out for wider stances, the elbows and knees are double jointed, and even the fingers get multi-point articulation instead of a fixed hand. Skirt armor is poseable on all sides specifically to clear the hip joints during deep poses. For a suit this size the range of motion genuinely rivals what you'd expect from a Master Grade, and the G-3 decal sheet gives you the option to run it clean or add the extra panel markings without committing either way permanently.

Lore & trivia

01The RX-78-3 was Tomino's original vision for the Gundam's color scheme before the sponsor pushed for the more marketable primary colors that became the RX-78-2's iconic look.
02In the Mobile Suit Gundam story, the RX-78-3 survived the Side 7 attack that destroyed the RX-78-1 and was carried aboard White Base as spare parts before later becoming a magnet-coating testbed unit.
03In the novel version of the story, the G-3 became Amuro Ray's mobile suit in the war's latter half after his original Gundam was lost in combat with Lalah Sune.