by Meprolight
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OpticsPlanet Exclusive Meprolight M21 1x30mm Reflex Red Dot Sight and MMX3 3x18mm Micro Magnifier is a dual-optic kit pairing the Meprolight M21 reflex red dot sight with the MMX3 3x18mm micro magnifier. The M21 is self-powered for day and night use via fiber optics and tritium, eliminating battery needs. The MMX3 magnifier provides 3x magnification with a side-flip design for quick engagement and seamless transitions between close and extended targets. The package includes both optics with quick-release Picatinny mounting to retain zero. Specifications highlight a 30 mm objective, 1x magnification, amber illumination, infinite eye relief, and compact dimensions. Package Contents: OpticsPlanet Exclusive Meprolight M21 1x30mm Reflex Red Dot Sight and MMX3 3x18mm Micro Magnifier.
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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