Yes, Olympos tail ends are made with the same material as bodies, but aren't chrome plated. I don't know how that "blacking" is properly called but it's chemically made.
What I dont like about Olympos: cup lid, which is actually not lid but something I don't know what
Brush goes with rubber needle packing at a time I use urethanes, so it doesn't suit me. But these issues are solved by simple changing parts
One more thing I don't like and can not change is that Olympos nozzle works badly with opaques
But as I understand, it's a problem for all small nozzles. At the same time, Iwata's 0,18 (CM-SB) works better with literally the same paint used in Olympos. I think it's because of gravity/siphon reason.
But MP sprays transparent paints like CM, I mean very fine spraying (pattern).
For me it's an AB for transparents only. Just my thoghts
As for me, it's good AB for the collection, it's not going to be my favorite
I don't like gravity airbrushes in general. I wonder what I'll say about MP-A, it has smaller nozzle and much smaller cup, and shorter body either. I like its appearance but can't say how it's at work.