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Holosun HS507K-X2 Open Reflex Sight with a green 2 MOA dot. Compact, rugged open reflex optic designed for subcompact pistols and compatible with Picatinny rails. Black finish.
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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