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Athlon 212101B Ares ETR First Focal Plane Scope. Features: 4.5-30x magnification, 56mm objective, 34mm tube, 3.9 in eye relief, side focus parallax from 25 yards to infinity, illuminated APLR2 MOA reticle (FFP), Fully Multi-Coated optics with XPL exterior coating, Argon purging for waterproof, fog-proof, and shock-proof performance. Exposed direct-dial elevation and windage turrets with locking windage. Built from 6061-T6 aluminum with a 34mm tube. MPN: 212101B; UPC: 813869021266. Condition: New
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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.
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Guide
A high-level overview of the main optic categories, explaining tradeoffs between speed, versatility, and precision for AR-15 builds.
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