Mobius Strip

As Mathub says, it's just a metal slide, the great thing is that the finish matches really well. Many thanks for your kind nomination! Don't get me wrong, I'm not that fussed on the style, seems weird, just handy when you are building an Airsoft gun and you do not have a black SCW chamber to hand. Sounds like you and I are from the same school of thought and era, I too prefer a blued upper on stainless frame, although I must confess to making a Kimber Custom CDP II (which was stainless on blued), but in my defence I did sell it

Actually on RS, sometimes the chamber is polished silver on a blued barrel, cosmetic reasons for one. I may have had one or two through my hands with just that colouration Clark do it on some of their barrels for example (quick search): I'm glad you like the Para's

Kimber Hi Caps WA SCW Para Ordnance HRT's with Prime and PGC Kimber metal slides, I just like those Kimber slides aesthetically

It is What's your other one?

WA SCW with PGC Kimber TLE/RL II metal slide and frame kit Pearl grips

WA SCW 2 Colt M1911 (WW1 era) Prime metal slide and frame, for said gun - which was very hard to track down! Hogue grips