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Holosun 507C X3 Open Pistol Reflex Sight. The HS507C-X3-RD-MRS updates the proven 507C platform with a reinforced housing, advanced brightness control, and Holosun's Multi-Reticle System in a compact optic built for pistols. It features a forward-facing photodiode with Solar Failsafe to automatically manage brightness, Shake Awake, IP67 waterproofing, and 5000G vibration resistance. Reticle options include 2 MOA dot, 32 MOA circle, or combined, with a 1x magnification and a battery life up to 100,000 hours. Mounting is compatible with the RMR footprint. Built from 7075-T6 aluminum with hard anodized 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