I'm new enough here that the level of comprehensiveness in some of the replies is still impressive to me, thanks for all the answers.
by the way, to clarify as well, the tomenosuke is plastic and zamac (zinc alloy). some pieces are another alloy that I don't remember. it is not stainless steel however. that would be awesome if someone machined a stainless steel blaster but I'm not sure it could be sold in restricted countries and it would also be super expensive!