Primary Arms MD-21 Red Dots

Published on December 21, 2025
Duration: 0:39

Elliott Delp provides an expert review of the Primary Arms MD-21S (GLx) and MD-21 (SLx) red dot sights, highlighting their affordability and features. He emphasizes their value as budget-friendly alternatives to high-end optics, detailing the ACSS reticle's utility for close-quarters battle and bullet drop compensation. The review is informed by his high authority level in firearms instruction.

Quick Summary

The Primary Arms MD-21S (GLx) and MD-21 (SLx) red dot sights are highlighted as budget-friendly optics, priced at $199 and $150 respectively. They feature a 2 MOA dot with ACSS reticle options for CQB and BDC, backed by a lifetime warranty, offering strong value against premium models.

Chapters

  1. 00:00Introduction to Primary Arms Red Dots
  2. 00:11Warranty and Features
  3. 00:22Reticle and Value Proposition

Frequently Asked Questions

What are the key features of the Primary Arms MD-21 red dot sights?

The Primary Arms MD-21 series, including the GLx and SLx models, offers affordable red dot optics. They feature a 2 MOA dot, ACSS reticle options for CQB and BDC, and come with a lifetime warranty, making them excellent budget alternatives.

How do the Primary Arms MD-21 optics compare to high-end red dots like the Aimpoint T2?

The MD-21 series is presented as a significantly more affordable option than the Aimpoint T2, offering comparable functionality for many users. While the T2 is a premium optic, the MD-21 provides excellent value for those seeking reliable performance without the high cost.

What is the ACSS reticle and what are its benefits?

The ACSS (Advanced Combat Optical Gunsight) reticle, featured on some Primary Arms optics, combines a central 2 MOA aiming dot with additional markings for Close Quarters Battle (CQB) and Bullet Drop Compensation (BDC). This versatility aids in faster target acquisition and accurate shooting at various distances.

What is the warranty on Primary Arms red dot sights?

Primary Arms provides a lifetime warranty on their red dot sights. This demonstrates the manufacturer's confidence in the durability and reliability of their products, offering peace of mind to the end-user.

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