One of the most popular rifle questions is co-witness configuration. Absolute or the lower 1/3rd co-witness?
In this guide, we explain it all.
What Is Co-Witness
Co-Witness refers to the line of sight the shooter sees in between iron sights and the optic reticle.
Referenced LaRue Tactical
Absolute Co-Witness - It aligns the iron sights perfectly with the middle part of the optic view window.
1/3rd Co-Witness - It sets the front iron sight post at the lower 1/3 portion of the optic FOV. It's biggest advantage is to unclutter the field of view, and this is the most popular co witness height on most rifles.
Night Vision Height - NV height doesn't co-witness with iron sight, and it's main purpose is to raise the optic height for night vision goggle users
Co-Witness Pros & Cons
ABSOLUTE CO-WITNESS
Pros
- Verify Zero Immediately
- Sight Sits Low
- Perfect For Low Cheek
- Perfect For AK Style Setup
- Perfect For Shotguns
Cons
- Front sight gets in the way
- Bulky hearing protection gets in the way
For shooters with a short neck, or using low cheekweld rifles should, and go with the 1/3 co witness and night vision height.
No matter which co-witness configurations you pick, make sure it's comfortable for you first.
Don't forget! the shooter can also have the option to flip down the iron sight after zeroing if it's a foldable sight.
Read more: Clear A2 Front Sight Optic Interference
LOWER 1/3 CO-WITNESS
Pros
- Clears Iron Sight Obstruction
- Much better neck positioning
- Clears bulky hearing protection
- Clears Rail Attachment Obstruction
- Comfort
Cons
- None
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