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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The Glock 43 RMSc cut slide accepts a specific footprint of micro red dot — the Shield RMSc pattern — and not every sub-compact optic fits it. If you're building a Glock 43 or 43X with an optics-ready slide, here's what actually mounts directly without an adapter plate, plus the screw spec you'll need on hand before you start. What is the RMSc footprint? RMSc stands …
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Why Buffer Tube Size Matters Mil-spec and commercial AR-15 buffer tubes look nearly identical but use different diameters. That difference determines which stocks fit your rifle and how solid the lockup feels. Buy the wrong one and your stock will either wobble or refuse to slide on at all. What Is the Actual Size Difference? A mil-spec buffer tube has an outer diameter of 1.14 …
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