Absolute Co-witness vs. Lower 1/3 Sights

Published on January 4, 2017
Duration: 4:30

This video clarifies the difference between absolute co-witness and lower 1/3 sight heights for red dot optics on AR-15 platforms. It highlights how lower 1/3 offers a better field of view and ergonomics, reducing visual distraction for faster target acquisition, while absolute co-witness can simplify initial zeroing. The demonstration shows how a spacer can convert a mount type.

Quick Summary

Lower 1/3 co-witness is often preferred for faster target acquisition as it reduces visual distraction by not requiring perfect alignment of the red dot with iron sights. Absolute co-witness can simplify initial zeroing but may lead to slower sight acquisition.

Chapters

  1. 00:00Defining Co-witness Heights
  2. 00:36Zeroing and Preference
  3. 01:25Visual Distraction and Speed
  4. 03:13Ergonomics and Field of View
  5. 04:02Hardware Demonstration

Frequently Asked Questions

What is the difference between absolute co-witness and lower 1/3 co-witness sights?

Absolute co-witness aligns your red dot sight directly with your iron sights. Lower 1/3 co-witness positions the red dot higher, so the iron sights appear in the bottom third of the optic's view, offering better ergonomics and less visual distraction.

Which co-witness height is better for faster target acquisition?

Many shooters find lower 1/3 co-witness superior for faster target acquisition. It reduces the visual clutter of perfectly aligning the dot with the front sight post, allowing for quicker focus on the target itself.

Can I change my optic mount from absolute co-witness to lower 1/3?

Yes, some optic mounts, like certain Daniel Defense models, allow you to switch between absolute and lower 1/3 heights using included spacers. This provides flexibility in setting up your rifle.

Does absolute co-witness simplify zeroing a red dot sight?

Absolute co-witness can simplify the initial zeroing process because you can directly align the red dot with your iron sights. However, the long-term benefits of lower 1/3 for shooting performance are often preferred.

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