HGUniversal Century

YMS-06K Zaku Cannon Test Type

A one-off prototype Zaku that turns a modest HG frame into a genuinely weird, cannon-armed silhouette worth the hunt.

MechaGrade Score

3.7/5

Zaku II · 1/144 · 2017

GradeHG

Scale1/144

Released2017

Runnersn/a

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The verdict

This is a kit for people who already love Zaku variants and want one nobody else on the shelf has.

The Origin-line engineering underneath is legitimately good for a mid-2010s HG, but the total package leans on your willingness to chase a Premium Bandai exclusive and live without any official marking decals. If you just want a great all-purpose Zaku, this isn't it. If you want the specific prototype bridging the standard Zaku II and the later Zaku Cannon, it delivers.

Best for: Zaku completionists and Origin-line collectors who want the missing link between the Zaku II and the Zaku Cannon

The full review

What it is

This kit depicts the YMS-06K, the prototype Bandai's Gundam The Origin MSD material invented to explain how the standard Zaku II evolved into the cannon-toting Zaku Cannon. It runs on the same Origin-line frame family as other HG Zaku releases from this era, so the elbows and knees are double-jointed, the head sits on a ball joint with a secondary tilt, and the shoulders can swing forward off the torso block for real reach. Holding the finished kit, the 180mm cannon and paired manipulator claws give it a completely different profile from a stock Zaku II, top-heavy and gun-forward in a way that actually reads as a transitional design rather than a reskin.

The catch

The biggest catch isn't the plastic, it's the packaging: this was a Premium Bandai online exclusive, so you're paying secondary-market or import prices and dealing with limited stock rather than a rack price at your local shop. Builders have flagged that there's no official decal sheet for the monoeye and hazard markings, so you either build it plain or go raiding decal sheets from other Origin and Zeon kits to dress it up yourself. The spiked shoulder armor has a cast-metal texture straight from the mold that looks great stock but is easy to sand away if you prime heavily, so go gentle if you want to keep it.

Who it's for

Buy this if you already have a few Zaku IIs on the shelf and want the prototype variant that explains the Zaku Cannon's design lineage, or if you like the cannon-and-claw silhouette more than the standard rifle-and-shield loadout. Skip it if you want your first Zaku, want a kit you can find at MSRP without hunting, or want a display piece with proper faction markings out of the box. This is a second-or-third-Zaku purchase, not a starting point.

What works

Double-jointed elbows and knees plus a swing-forward shoulder mount give it real posing range for an HG from this era
The 180mm cannon and paired big-gun manipulators create a genuinely distinct silhouette against a standard Zaku II
Cast-textured shoulder spikes straight from the mold add a rough, metal-like finish without any extra work

Worth knowing

No official decal sheet exists, so monoeye and warning markings have to be scavenged from other kits or skipped entirely
Premium Bandai exclusive status means chasing secondary-market pricing and limited stock instead of a normal retail buy
Heavy priming can sand away the factory shoulder texture that's one of the kit's nicer stock details

Sold? Grab it.

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The build story

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

The build itself sits comfortably within Origin-line HG norms: gates are placed where you'd expect on the arms and legs, cleanup is straightforward, and the frame doesn't fight you during assembly. Where it gets interesting is the cannon and manipulator arm assembly, since those big gun-holding limbs are hollow and jointed rather than solid, which keeps weight down but means careful handling while you're clipping parts so nothing gets stressed at the joints.

Articulation is the strongest part of the package for its grade. The ball-and-socket head, double-jointed elbows and knees, and forward-swinging shoulder blocks let you get the cannon into genuinely dynamic firing poses rather than the stiffer stances older Zaku molds are known for. Color separation on the body is handled well through molded plastic rather than stickers for the main color blocks, though the lack of any marking decals means the finished kit reads a little bare next to a fully marked-up Zaku II unless you source your own sheet.

Lore & trivia

01The YMS-06K was conceived in Gundam The Origin MSD material as an anti-aircraft prototype built for the North American California Base, meant to bridge the standard Zaku II and the later MS-06K Zaku Cannon.
02Its head carries a 360-degree monoeye sensor, a refit from the standard Zaku II's monoeye rail, reflecting its anti-air defense role.
03The project was reportedly shelved due to weight balance problems before its equipment and design language were folded into the definitive Zaku Cannon.
04This HG was released as a Premium Bandai online-exclusive kit rather than a standard retail release.