Yup, they made a big divet so he gets a nice tight pose upward, but it basically won't let him move his arm left/right at the elbows to any great effect.
China sellers I've found usually have overproduction junk... Well not usually, but in the line of stuff, they aren't always sure what accessory goes with what even. They'll sometimes just throw something random in even, to fill it out a little, but others research and find out what a figure requires.
I'd love a cheap accessory source for good, in-demand pieces, but at fair prices... Casting in resins usually doesn't come out to a fair price by most people's standards.