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ARO-CORE (Advanced Rifle Optic Core) is an evolution of the popular 20mm 403 and 503 series optics, delivering enhanced performance in a refined 22mm housing. Designed to pair seamlessly with magnifier systems, ARO-CORE features a 1.63" lower 1/3 co-witness pedestal mount for optimal alignment on modern sporting rifles. Available as a 2 MOA dot only or with the Multi-Reticle System (MRS) in Red, Green, or Gold, this optic offers flexibility for a wide range of shooting applications.
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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