Mass production type straight build shot (eye sticker applied only)

MS-06R-1A High Mobility Zaku II straight build shot

MS-06R-2 Johnny Ridden's High Mobility Zaku II straight build shot

The universal size reference — compared against a cigarette pack.

Left side is the mass production type parts, right side is the high mobility type parts. Only the legs and backpack are different.

Mass production type Zaku II (with seals applied)

The weapons are fairly plentiful for what it is.

The mono-eye is supposed to be rotatable, but when you actually try it, it's a bit baffling;
When you turn the head, the eye stays put and only the head shell rotates..

It all comes down to how the internal head structure is built.
The head itself isn't fixed — the mono-eye rotation piece is attached to the body instead.
So to actually move the eye, you have to force the entire head to turn along with it.

Some action poses

The Zaku machine gun has a spring gimmick, and the missile flies out in a nice straight line.
To fire it, just press the round magazine on top.

There's also a cracker (a type of hand grenade) thrown in as a bonus..
And oddly enough, you can launch it from the Zaku machine gun too.

Beam tomahawk and bazooka action

The head antenna is molded directly onto the head.. so it defaults to a commander type build.
If you want the plain-headed grunt version, you'd have to cut it off entirely..

These are the parts added when the price went up by ¥100 at the 1999 reissue.
Magella Top cannon, cracker, missile pod, spring pipe...

There's an option to replace just the head's power pipes with a spring instead of plastic parts..
But the mismatch between the two types of power pipes is pretty jarring;;

As you can see, when you fit the spring on, it's way too round and wide, so it looks pretty terrible -_-;
No matter how you look at it, this feels like a bonus that would've been better left out..

The missile pod clips onto the joint between the torso and legs.
The detail is pretty plain, isn't it? Kind of cute in a way though..

With all the extra options equipped. That spring still looks a bit off -

Magella Top cannon action.

Using a weird trident piece, you can have it hold the Zaku machine gun's missile.
A very random bonus, very SD.

You can also stick a cracker onto that trident.

MS-06R-1A High Mobility Zaku II
You just swap out the backpack and legs.
Of course the colors are completely off from the official scheme, so you'll need a full paint job to do it properly.

The high mobility backpack detail is pretty bland~.

Some action poses.

MS-06R-2 Johnny Ridden's High Mobility Zaku II.
You just add one extra armor piece to each side of the high mobility Zaku II's legs.
Going by the official colors the whole thing should be bright red, so again, a full paint job is a must ^^;

Together with other old-school Zeon SD kits.

Together with the old-school SD Perfect Gundam.

Together with the MG and HGUC mass production type Zaku II. The HGUC Zaku II's molded color still feels way too bright.

Together with the MG MS-06R-1A High Mobility Zaku II kits. The colors are completely different ^^;

Together with the MG MS-06R-2 Johnny Ridden's High Mobility Zaku II. The colors are literally polar opposites..
And since it's really just the leg covers added on, well, meh.