Pistol Red Dot RDS 101 with Holosun Optics

Published on January 13, 2026
Duration: 20:28

This guide, presented by Scott Jedlinski, a seasoned firearms instructor and former law enforcement officer, details the essential steps for mounting and zeroing a pistol red dot sight (RDS). It emphasizes proper preparation, including cleaning and thread locker application, to ensure optic reliability. The guide also covers the importance of correct torque and the process of zeroing the optic for accurate shooting.

Quick Summary

Properly mounting a pistol red dot sight (RDS) involves degreasing slide threads, applying thread locker to screws, careful alignment, and tightening to the correct torque. After mounting, zero the optic at a known distance (e.g., 10 yards) by adjusting the reticle to match the point of impact, typically in 1 MOA increments.

Chapters

  1. 00:00Introduction and Partnership
  2. 00:50Evolution of Pistol Red Dots
  3. 02:00Speaker Background
  4. 02:39Advantages of Red Dots
  5. 03:55Reticle and Color Options
  6. 04:34Sizing Optics to Pistols
  7. 07:00Open vs. Enclosed Emitters
  8. 10:45Holosun Product Lines: 500 Series
  9. 13:00EPS and EPS Carry
  10. 14:30SCS (Solar Charging Sight) Technology
  11. 18:21Mounting and Maintenance
  12. 19:02Zeroing and Training

Frequently Asked Questions

What are the key steps for mounting a pistol red dot sight (RDS)?

Begin by thoroughly degreasing the slide threads. Apply a quality thread locker to the mounting screws, then carefully mount the optic, ensuring proper alignment. Tighten screws to the manufacturer's specified torque and perform a function check.

Why is using thread locker important when mounting an RDS?

Thread locker prevents the optic mounting screws from loosening due to the vibrations and recoil generated during firearm operation. This ensures the optic maintains its zero and prevents potential equipment failure.

How do you properly zero a pistol red dot sight?

After mounting, zero the RDS at a known distance, typically 10 yards for pistols. Use a target with clear aiming points and make 1 MOA adjustments to the reticle until the point of impact matches the point of aim.

What is the difference between open and enclosed emitter red dots?

Enclosed emitters, like the Holosun 509T, protect the LED from debris and moisture, making them more durable for harsh conditions. Open emitters, like the Holosun 508T, may offer a wider field of view but are more exposed to the elements.

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