Thanks for such a comprehensive comment. I have heard about 3D printable weapons, but I do not deal with such things due to their illegal status. As for this model, it's just a "game-engine-ready" model as a fanart for Eva, rather than some super exact copy :) and made in Blender, not CAD.
But still thanks - I read about what you mentioned - an interesting story, regret that it is so dangerous and tragic.
Make love not war!
Peace.
RE: Evangelion Small Arms - HK USP .45 - Katsuragi Misato