I've recently been revisiting the concept. Back in November I noticed that I was having trouble focusing on the front sight - I just couldn't shoot tight groups the same way anymore. I tried a dot gun and it was like the magic was back. So I decided to commit to MRDS pistols for 2020. I had sold my previous GEN4 G19 ATEi build, so for this iteration I started with a G45 MOS and simply added the KKM barrel and compensator. Since the G45 offers an integrated magwell and front serrations from the factory, I didn't feel the need to go with custom milling. I also prefer the G17 grip length. Right now I'm running an extra RM01 I had lying around; my plan is to replace it with a RM06 and a CHPWS plate. This is an older picture with a DPP.
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I don't see myself going back to irons, so this time around the Roland feels less like an experiment to try and more like a sidearm to master. I'm not yet where I was in terms of speed with irons, but I'm closing the gap quick. I'm still a bit slower to the first shot. My last practice session before the local ranges closed ended with FAST times of 5.30 and 5.37. Recoil control isn't my greatest strength; the compensator complements the MRDS and helps me track the dot. I've been dedicating my dry fire practice to cleaning up my draw and presentation; I'm hopeful that will mitigate the temporary loss in live fire practice.
I'm wondering when we'll see a compensated MOS gun direct from the Glock factory. There's already the S&W PC model, and I suspect a SIG isn't far behind.