HGUniversal Century

GM GM Weapons

A cheap little parts box that turns one GM into three different guns.

MechaGrade Score

3.6/5

GM GM Weapons · 1/144 · 2017

GradeHG

Scale1/144

Released2017

Runnersn/a

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The verdict

I like this set more than its price tag suggests I should.

It is not a mobile suit kit at all, it is a weapons expansion built for the Build Fighters GM/GM, and on its own terms it delivers real modularity for around nine dollars. You get twelve interchangeable pieces (gun bodies, barrels, forends, stocks, a magazine, and a scope) that snap together into a beam rifle, a beam sniper rifle, a grenade launcher, or a beam machine gun. For an accessory pack that is a genuinely good hit rate.

Best for: GM/GM owners and Build Fighters weapon collectors who want extra loadouts without buying a second full kit

The full review

What it is

This is a weapon runner set from the HG Build Custom line, sized and designed to arm the RGMGM-79C GM/GM from Gundam Build Fighters, though the parts are generic enough to hand off to plenty of other 1/144 Earth Federation kits. Snap the gun body, one of three barrels, one of three forends, and one of three stocks together and you get a beam rifle, a beam sniper rifle, a grenade launcher, or a beam machine gun, plus a separate beam pistol with a handle that pivots into different grips. Nothing here needs glue or paint, and it clips together fast. I went from sprue to a full rack of four distinct guns in one sitting, which is exactly what a set like this should deliver.

The catch

It is not a mobile suit, so if you came here expecting articulation or a torso to pose, this is the wrong page. The molded colors are plain gray and black, so if you want the barrels to read as beam weapons you are painting or panel lining them yourself. Reviewers who bought it also flagged the obvious limit: outside the beam pistol, you effectively get parts for two more full weapons, and the swap combinations run out fast once you have tried the main configurations. If you want real loadout variety you are buying a second set, and at that point the cost per gun climbs.

Who it's for

Buy this if you already own or plan to build the GM/GM and want it holding something other than the stock rifle, or if you collect weapon accessory runners to arm other HG kits in your display case. It is a smart, cheap add-on, not a standalone project. Skip it if you are shopping for your first kit or want a suit to actually build and pose, this set has no body, no joints, nothing to articulate. Pair it with a GM or GM/GM you already have and it earns its keep.

The build story

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

The parts are cut cleanly off two small runners with minimal cleanup, and the snap-fit tolerances are tight enough that finished weapons do not wobble apart in a Gunpla-scale grip. Swapping barrels and stocks takes seconds once you know which peg fits which slot, and I did not need any tools beyond nippers and a gate remover for the whole build.

The clever part is the beam pistol's pivoting handle, which lets one small piece serve two different grip angles instead of molding two separate parts. Combined with the interchangeable barrel and stock system, the set punches above its size for the number of finished weapon silhouettes it produces, even if the color separation is left entirely to the builder.

Lore & trivia

01The GM/GM (RGMGM-79C) is a fictional custom Gunpla built by the character Yuuki Tatsuya in Gundam Build Fighters, styled as an upgraded RGM-79 GM with mixed Federation-era parts.
02This weapon set belongs to Bandai's HG Build Custom (HGBC) line, a sub-line specifically dedicated to accessory and weapon runners rather than full mobile suit kits.
03The set's beam pistol handle pivots to change grip configuration, letting a single molded part double as two different weapon poses.