Apparently some parts are MIM, but heck, what isn't these days? I see no problem with it, as .380 ACP isn't a powerhouse round with massive recoil force; I do like some of the interesting facts in this little PDF file though. I love my two DB380's! http://phillipsmetals.com/assets/files/InterfaceDiamondback.pdf Says the DB380 has tight tolerances; I think I can believe that; the DB380 doesn't really have much play in the slide and such. Maybe why it needs to be broken in?