This guide covers the installation and zeroing of Primary Arms MD-21 (SLx) and MD-21S (GLx) red dot sights. It details selecting mounts, attaching the optic, powering on, and adjusting for zero using 0.5 MOA clicks. The guide emphasizes safety and highlights features like the ACSS-CQB reticle and solar power option on the GLx model. Instruction is provided by experienced gear reviewers from Elliott Delp's channel.
This SHOT Show 2024 coverage highlights new optics from Primary Arms, including the PLX 1-8x with a Nova reticle featuring AutoLive technology for extended battery life. The GLX 1x Micro Prism offers infinite eye relief and an etched reticle suitable for astigmatism. New SLX mounts and MD 21 dots with solar capabilities are also showcased, with many products slated for Q2 availability.
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