Size comparison with a cigarette pack

With the additional weapons for the Ceres Battle spec removed.

The right arm weapon configuration differs between the normal version / Full Armor spec and the Ceres Battle spec.
It works by swapping the weapon unit on the front and back of the shoulder parts.
On the left is the Ceres Battle spec's Type-90 Medium Laser, and on the right is the normal version's Type-88 90mm 70-caliber High-Energy Charged Particle Cannon.

The normal version's articulation is pretty decent, though
there's an issue where the hip joints tend to pop out during posing.

The shoulder structure makes it look like the arms won't raise sideways, but there's a separate internal shoulder joint, so they can go up about 45 degrees.

The band sections on either side of the waist and the verniers on the tail(?) move around freely.

The structures on either side of the verniers can be swapped out for elongated protruding forms.

Remove the left hand, swap in the 4-point joint parts, and extend the elbow...

Then, as shown above, bend the left arm 90 degrees and plug it in alongside the right arm weapon unit,
then lock the precision sniping head onto the shoulder and neck area to complete a unique firing pose.
You can also pull the barrel forward to extend it at this point.

The hatch on the Type-87 High-Mobility Guided Missiles mounted on top of the left shoulder can be opened,
though it's not a hinged mechanism — you just pull the cover off and plug it back in.
Also, the hatch tends to fall off easily from any bumps, so be careful when posing. -_-

You can also add weapons to the normal version in the Full Armor spec.

The Type-88 Short-Range Diffusion Particle Cannon is only attached to the left arm in the Full Armor spec.

The right arm weapon for the Ceres Battle spec can also be folded in half.

Only 3 vernier parts are left over as leftover parts.