re: Paging igchris

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I would think they are all the same. The ATOM slides have the different adapters for each optic. They only have one that is for the RMR. If there were different mounting specs I would think they would have different RMR adapters, but I could be wrong.

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Well that means mounting screws and bosses would likely be placed the same or the plates have generous tolerances, and since ATOM/ZEV/etc have over sized pockets it doesn't say much about the OAL. I'm shooting for more of a press fit and so far it looks like some of these RDS dimensions can vary from .05" to as much as .1" within the same SKU for hole placement, diameter and overall length and width. But then again making those adjustments per sight isn't really a problem once you have the basic model drawn up.

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My M&P Core came with a bunch of different baseplates if you need to fondle some. Obviously the RMR base is on the gun but the others are just sitting in the box.

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I might take you up on that since I can 2D probe the plates on the CNC to create the basic model then make adjustments from there instead of starting from scratch. Although, probing takes a really long time to complete at resolution I would need to do it.