I'm in the process of updating some older pistols to more modern accessories, and plan to send my G19.5 non-MOS slide to get an optic cut.

I like the solar power, green dot, and auto-brightness of the Holosun SCS MOS, but don't want to mill a slide for the now defunct MOS cut, and I also want an enclosed emitter for this optic.

So I've narrowed it down to either the Deltapoint Pro cut for the SCS 320 or the K cut for the SCS Carry.

The SCS 320 is currently the better optic option with a nice wide window, but the DPP cut seems to be slowly fading from popularity, so I'm hesitant to lock that slide into that for future optic options. (Though if needed, I suppose I could just replace the slide entirely at some point in the future.)

The SCS Carry is a bit smaller, but uses the RMSC-based K cut, which appeare to be becoming fairly widely accepted, so seems to be the better option for future compatibility.

What's the brain trusts' thoughts on getting the DPP vs. K cut?

The last few guns I've bought or had cut I've gravitated towards RMSc/Holosun K cut on purpose, as it seems to support a much wider variety of options. My most recent optic purchase was an Osight SE (native RMSC cut), and although I was initially skeptical due to the low price and the brand, I'm a few months and over 2000 rounds into it and so far I'm absolutely loving it.

I agree with the RMSC cut as you have a few options and Holosun seems to be one of the better/best choices for the cut. I had one done on my son's Glock 43x and he couldn't be happier and he has a Holosun 407K X2 on it.

Another vote for the RMSC cut; also another guy that's become a huge fan of the Osight SE.

Osight SE.