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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The Glock 43X and Glock 48 MOS pistols only accept RMSc-footprint optics, which makes the optic-selection problem narrower and cleaner than full-size Glock work. This isn't a 50-option category like the Glock 17 or Glock 19 lineup — the right pick comes down to glass quality, dot crispness, whether the emitter is open or enclosed, and whether you want a circle-dot reticle …
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Co-witness on a pistol works differently than on an AR-15, and most of the bad advice online comes from people applying AR-15 sight geometry to a Glock. On a pistol the optic is only a few millimeters above the slide, the irons are short, and there's no riser to push the optic up to a "lower 1/3" position the way an AR-15 carry-handle setup does. This guide covers absolute vs l …
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