To answer a few questions...
No, he's not as heavy or as solid as Cap simply because of the electronics and wiring inside, which require hollow arms, chest and head cavity to make happen. HOWEVER, the legs are solid as are the joints. That said, the joints on the IM I have are more loose than the joints on my 18" Cap, which isn't a bad thing, it simply means I have to pose him just right to ensure he says upright without a stand (I don't normally use stands for my 18" figs).
He's NOT made of what I expected and he should be easy to battle damage if you have any skill whatsoever with a dremel and some putty or epoxy (whatever you use to sculpt small battle damage on metal). He is NOT made of the harder plastic which NECA used on the 12" Marcus Fenix (Gears of War) and 12" Kratos (God of War), which both had electronics, but is instead made of the same softer, more durable and pliable plastic that 18" Cap and the 18" Preds are made from. This is a major bonus as - even with the electronic inside - he's super durable. He fell 4 feet from my photography platform multiple times during the photo shoot and the only issue was his shoulder armor plates popped off (they snap on and off thanks to a small articulated C-snap peg which attaches to the shoulder joint - great engineering really!)
As for the articulation, he's got ball-in-socket ankles and wrists, double hinge knees and elbows, ball joint hips and shoulders (though hip articulation is limited and clicks, which helps keep him upright), a twist waist, ball-in-socket chest (though I've not spun him 180 degrees around) and a twist neck as well as ball-in-socket head. The head is limited due to the armor/collar, but it's still able to go up and down, side to side fairly well. It doesn't go down enough IMHO, but with a bit of work on the joint, one could get it working better.
Here's my IM with a test layer of "mud/scrapes" to see how it'd look and what I need to do to make him "battle damaged."
This took my 15 minutes, 2 brushes and only a bit of acrylic paint. Acrylic will whip off of this figure fairly easy due to the gloss finish and type of plastic, so a matte spray on after painting is over is gonna be required.
