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Primary Arms SLx Compact 1x20 Prism Scope Red Dot Sight with ACSS Cyclops Reticle. This compact prism scope provides generous eye relief and a large exit pupil for fast target acquisition. Diopter adjustment allows quick focus, and illumination is available across 11 brightness settings with battery powered reticle illumination up to 3,000 hours at medium brightness. Mounts on standard Picatinny rails and is compatible with industry standard micro red dot mounts. ACSS Cyclops reticle enables fast range estimation and moving-target leads out to 400 yards for .223 Rem/5.56 NATO, 5.45x39mm, and .308 Win/7.62 NATO; 7.62x39mm and 300 BLK out to 300 yards. Hardcoat anodized with ceramic top coat; waterproof, fogproof, and shockproof.
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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