Primary Arms MD-21 Red Dots

Published on December 21, 2025
Duration: 0:39

Elliott Delp reviews the Primary Arms MD-21S (GLx) and MD-21 (SLx) red dot sights, highlighting their affordability and value. He emphasizes the versatility of the ACSS reticle and positions these optics as strong alternatives to much more expensive models, backed by a lifetime warranty.

Quick Summary

The Primary Arms MD-21S (GLx) red dot sight costs $199, and the MD-21 (SLx) is $150. Both come with a lifetime warranty. The ACSS reticle offers a 2 MOA dot for CQB and BDC adjustments, making them strong value alternatives to optics like the $900 Aimpoint T2.

Chapters

  1. 00:00Introduction: MD-21S & MD-21 Models
  2. 00:11Warranty & ACSS Reticle Features
  3. 00:22Value Proposition vs. Aimpoint T2

Frequently Asked Questions

What are the price points for the Primary Arms MD-21 red dot sights?

The Primary Arms MD-21S (GLx) model is priced at $199, while the more budget-friendly MD-21 (SLx) model costs $150. Both offer significant value for their features.

Does Primary Arms offer a warranty on their red dot sights?

Yes, Primary Arms provides a comprehensive lifetime warranty on their red dot sights, ensuring long-term support and customer satisfaction for these optics.

What makes the ACSS reticle special on Primary Arms optics?

The ACSS reticle, featured on models like the MD-21S, combines a 2 MOA dot for CQB with bullet drop compensating (BDC) stadia lines, offering versatility for different shooting scenarios.

Are Primary Arms red dots a good alternative to expensive optics?

According to reviewer Elliott Delp, the Primary Arms MD-21 series optics, priced around $150-$200, are excellent alternatives to high-end sights like the Aimpoint T2, which can cost upwards of $900.

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