So I was watching a youtube video interview from ATEI, and the interviewer and the owner from ATEI was mentioning how his cuts are much better fitted for RMR than compared to Smith & Wessons C.O.R.E model and how the C.O.R.E RMR fitting tends to loosen up if banged around or will require more frequent adjustment, I was wondering if this was true or not for those who have the C.O.R.E model? I only ask because it's just a bit of a concern for me due to the fact I had just purchased the M&P PC ported 4.25 and spent a good amount of money on it and is my first M&P pistol and planning on buying a trijicon RMR to go with it.

I don't know about RMR, but I haven't had any difficulty mounting any of the Deltapoints to mine. I install them, adjust the zero to the iron sights, then shoot. They're right on at that point. I've got >50K rounds with a Deltapoint mounted.

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Minimize the variables

Thanks for the response, so you haven't had issues with your delta point loosening up nor having to re-zero them?

I don't even re-zero when I take it off to use that pistol for IDPA and then re-install it. It registers perfectly every time.

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Minimize the variables

I have an RMR on my CORE and it is tight as heck. My Cop buddies have the same set up and have operated them for an excess of 6 months with no problem.

We have a core with a rmr rm05g on it . I have taken it off and back on 4 times just to see how it reacts while at the rnage . Optice seems to care less it it was removed and reinstalled. Zero was for me the same .

Just goes to show that gun shop experts are no the all knowing they make act like.

My experience is that gun shop experts are pushing a product they can make some money on.