>>6143163The hip and leg joints are metal, or at least feel that way to me. The arm joint (see pic) appears to use a mix of plastic and die cast (plastic in the centre, with metal on the sides). The figure also feels slightly lighter overall than an official MB, but not by much.
As I mentioned, they didn't skimp on the important things (i.e. joints are nice and tight). And the few indicators of it being a KO are extremely minor and mostly cosmetic (e.g. the clear green pieces aren't as polished/shiny).