How-To Zero a Red Dot Optic (RDO) on Your Rifle | SIG SAUER

Published on September 28, 2025
Duration: 4:58

This guide details the process of zeroing a red dot optic on a rifle. It emphasizes the importance of a stable shooting platform, proper optic brightness, and methodical adjustment based on shot group analysis. The instructor, Mike from 6our Academy, walks through shooting groups, calculating adjustments using MOA values, and confirming zero with subsequent shots.

Quick Summary

To zero a red dot optic on a rifle, start by establishing a stable shooting platform and setting the optic's brightness to minimize blooming. Shoot a five-round group, analyze the shot dispersion, and calculate adjustments based on the optic's MOA per click value to move the impact to your point of aim.

Chapters

  1. 00:00Introduction and Stable Platform
  2. 00:34Red Dot Brightness Settings
  3. 00:52First Shot String and Safety Check
  4. 01:27Checking First Target Group
  5. 01:42Calculating Initial Adjustments
  6. 01:57Understanding Optic Adjustments (MOA per Click)
  7. 02:24Making Optic Adjustments
  8. 02:48Shooting Second Group
  9. 03:24Checking Second Target Group
  10. 03:39Fine-Tuning Adjustments
  11. 04:36Checking Third Target Group and Confirmation

Frequently Asked Questions

What is the first step to zeroing a red dot optic on a rifle?

The first step is to ensure a stable shooting platform. This can be achieved using a tripod, bench rest, or a solid prone position to guarantee consistent shot groups on paper.

How should the brightness of a red dot optic be set for zeroing?

The brightness should be set just low enough to still see the red dot clearly. If it's too bright, blooming can occur, making it harder to achieve a fine point of aim.

How do you calculate optic adjustments for zeroing?

Measure the deviation of your shot group's center from your point of aim. Then, use the optic's MOA per click value to calculate the number of clicks needed to move the impact to your desired point.

What does MOA mean in relation to optic adjustments?

MOA stands for Minute of Angle. For example, an optic with 0.5 MOA per click means each click moves the point of impact by half an inch at 100 yards.

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