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Holosun HE403B-GR-FDE Green Dot Micro Sight with 2 MOA green dot, Shake Awake, 20 mm mounting footprint. Battery life up to 50,000 hours (Setting 6); includes Low Mount and 1/3 Co-witness; compatible with Picatinny and Weaver rails; CNC aluminum housing; parallax-free with unlimited eye relief.
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An analysis of AR-15 optic mounting heights, how height-over-bore affects zero offset and holdovers, and the tradeoffs between absolute co-witness, lower-third, and taller mounts.
6 min read
Guide
A high-level overview of the main optic categories, explaining tradeoffs between speed, versatility, and precision for AR-15 builds.
7 min read