Images have already been leaked, although there is a 8/5 embargo date on reproducing/distributing them. Here's a deliberately modified version (or you can go and Google the original leaked images yourself).

But even through the "censorship," you can still see the articulated arms and legs, as well as fist holes that allow them to hold pistols. They also have wrist swivels, although the front wheels are attached to the base of the fists, so turning the fists also rotates the wheels. e.g. if the fists are upright, then the wheels are turned 90 degrees from the shoulder wheels etc.