Red Dots & Height Over Bore

Published on November 15, 2023
Duration: 1:00

This video explores the evolution of red dot sight mounting systems, focusing on height over bore. It covers historical carry handle mounts, modern lower third co-witness setups, and advanced configurations for night vision compatibility using magnifiers. The discussion highlights how mounting height impacts aiming and is crucial for specialized applications like NVG use.

Quick Summary

Height Over Bore is the vertical distance between the barrel's center and the optic's line of sight. Early red dots used high carry handle mounts; modern setups include lower third co-witness for backup irons and high risers for magnifiers, crucial for night vision compatibility.

Chapters

  1. 00:00Intro: Red Dots & Height Over Bore
  2. 00:07History: Carry Handle Mounts
  3. 00:13Modern: Lower Third Co-Witness
  4. 00:23Advanced: High Risers & Magnifiers
  5. 00:40Night Vision Setups

Frequently Asked Questions

What is Height Over Bore in firearms optics?

Height Over Bore refers to the vertical distance between the center of the firearm's barrel and the center of the optic's line of sight. This measurement significantly impacts bullet drop compensation and aiming adjustments at different distances.

What is a lower third co-witness setup for red dots?

A lower third co-witness setup means your backup iron sights appear in the lower third of your red dot optic's field of view. This allows for quick target acquisition with the red dot while ensuring your irons are readily available if the red dot fails.

How are red dots mounted for night vision use?

For night vision (NVG) use, red dots are often mounted high, sometimes directly on top of magnifiers. This elevated position allows shooters to maintain a proper cheek weld and sight picture while wearing night vision goggles.

What were early red dot mounting systems like?

Early red dot systems on rifles like the AR-15 were often mounted very high, typically on the carry handle. These setups relied on the iron sights integrated into the carry handle as the primary backup sighting solution.

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