by Meprolight
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The Meprolight GLS HD 400M Grenade Launcher Optical Sight is a MIL-SPEC grenade launcher optic designed for standalone top-mount use on Picatinny rails. It features a large eye relief and illuminated dot reticle for quick target acquisition with both eyes open. The internal compensating system accounts for grenade spindrift to maintain accuracy from 50–400 meters. The compact sight mounts to Picatinny rails and is intended for AR platforms with 40 mm grenade launcher integration. Color: Black.
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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