Never put it passed the CZ factory to grab random parts and invent a new gun.
It looks like the OEM Orange bushing, since I don't see the CZC engraving that would make it one of their Accu versions.
The slide is definitely not a stock S2 slide with the CZC RDS cut. It's the stock OR slide, but with rear serrations. I'm not even sure how that could end up in a parts bin since it doesn't exist???
Is this a Euro only version?
Maybe - it's similar to how they had the Tactical Sport Blue... maybe it's an upcoming Shadow 2 Blue?