Slide cut and optic footprint are not the same thing — and getting them mixed up is the single biggest mistake we see at checkout. A footprint is the mounting pattern on the bottom of an optic. A slide cut is the milled recess on top of the slide that has to match it. If the screw holes and recoil lugs don't line up, the optic doesn't sit flat, and nothing you torque it t …
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The forum answer is always "bigger dot = faster sight picture, smaller dot = more precise." That's not wrong, but it's not the whole answer. Pistol red dot dot size — measured in MOA, where 1 MOA covers roughly 1 inch at 100 yards — has to match the distance you actually shoot at, the size of the target you're trying to hit, and how much eye strain you can tolerate …
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Optic footprint mismatches drive more red-dot returns than any other slide question. The cut on your slide and the bolt pattern on your optic have to match — and the terminology is confusing because "RMR cut," "RMSc cut," and "Holosun K" refer to bolt patterns that are not interchangeable. This guide maps each footprint to the Glock platforms 3CR cuts slides for, explains …
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