When the P365 Spectre Comp's were announced. I knew the aftermarket was also going to pursue the idea. I guess we didn't have to wait long:
www.armorycraft.com
I think it's ugly as sin, but it will be interesting to see what others start to come out with too!

Armory Craft P365 COMP Slide with RMSc Optics Cut | armorycraft
- Armory Craft P365 COMP Slide with RMSc Optics Cut- Limited Edition - our first batch just arrived.These slides are stylistically based on the SIG P365 Spectre / P365 X-Macro and have a built-in compensator in the slide, which significantly reduced the felt recoil. No need to spend $$$ on the...

I think it's ugly as sin, but it will be interesting to see what others start to come out with too!