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Leupold Standard Extension Rings designed for Leupold STD bases. These extension rings are machined steel and deliver tight tolerances, providing an additional 5/8 inch of ring spacing. They are available in five different heights.
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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