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Ultradyne C4 Flip-Up Rear Sight UD10400 Color: Black, Condition: New, $9.51 Off w/ Free S&H

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Ultradyne C4 Flip-Up Rear Sight, Picatinny Mount, Black, UD10400
Ultradyne C4 Flip-Up Rear Sight, Picatinny Mount, Black, UD10400
Ultradyne C4 Flip-Up Rear Sight, Picatinny Mount, Black, UD10400
Ultradyne C4 Flip-Up Rear Sight, Picatinny Mount, Black, UD10400
Ultradyne C4 Flip-Up Rear Sight, Picatinny Mount, Black, UD10400
Ultradyne C4 Flip-Up Rear Sight, Picatinny Mount, Black, UD10400
Ultradyne C4 Flip-Up Rear Sight, Picatinny Mount, Black, UD10400
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Ultradyne How to Sight In With Ultradyne C4 System Video
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Ultradyne C4 Flip-Up Rear Sight Picatinny Mount Black UD10400 Application Video
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Ultradyne C4 Flip-Up Rear Sight Picatinny Mount Black UD10400 Application Video
Ultradyne C4 Flip-Up Rear Sight, Picatinny Mount, Black, UD10400
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Ultradyne C4 Flip-Up Rear Sight, Picatinny Mount, Black, UD10400
Ultradyne C4 Flip-Up Rear Sight, Picatinny Mount, Black, UD10400
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Ultradyne C4 Flip-Up Rear Sight, Picatinny Mount, Black, UD10400
Ultradyne C4 Flip-Up Rear Sight, Picatinny Mount, Black, UD10400
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Ultradyne C4 Flip-Up Rear Sight, Picatinny Mount, Black, UD10400
Ultradyne C4 Flip-Up Rear Sight, Picatinny Mount, Black, UD10400
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Ultradyne C4 Flip-Up Rear Sight, Picatinny Mount, Black, UD10400
Ultradyne C4 Flip-Up Rear Sight, Picatinny Mount, Black, UD10400
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Ultradyne C4 Flip-Up Rear Sight, Picatinny Mount, Black, UD10400
Ultradyne C4 Flip-Up Rear Sight, Picatinny Mount, Black, UD10400
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Ultradyne C4 Flip-Up Rear Sight, Picatinny Mount, Black, UD10400
Ultradyne C4 Flip-Up Rear Sight, Picatinny Mount, Black, UD10400
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Ultradyne C4 Flip-Up Rear Sight, Picatinny Mount, Black, UD10400

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Questions & Answers
Customer Reviews
Helpful Positive Review
C4 Flip-Up Rear Sight by Cosh, Verified Owner, November 5, 2023
These sights are awesome when paired with the Dynamount front sight for carbines or rifles with a short handgauard that would give you a very short front/rear sight setup if mounted on the end of a short rail. YOu can change the apparture to suit you...
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1/1 found this helpful
Helpful Positive Review
Quality product by Tim, May 14, 2021
Installed on my AR10. This along with the C4 front sight and Apollo compensator is a perfect system. It's well made and quite robust. Makes one and one half inch groups with iron sights. I was pleasantly surprised at the accuracy. Ultradyne produces ...
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1/1 found this helpful
Helpful Positive Review
Ultradyne Flip-up Rear sight by Tom G., February 24, 2022
The price was the best that I have seen in years on Line. Bought the sight at Optics Planet.com. The installation was very easy, crisp and precise. The function of the sight ...
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1/1 found this helpful
Most Recent Reviews
favorite buis by SCtay, Verified Owner, March 23, 2024
Closest you can get to a red dot with irons. Easy to find the target quickly and great for hitting targets further out since your view isn’t blocked.
Read All 4 Reviews
Color:
Black
Condition:
New
Sight Position:
Rear
Gun Make:
AR Platform
Front Sight Color:
REAR SIGHT ONLY
Rear Sight Color:
Black
Included Accessories:
None
Illumination Color:
None

Code: 3HE-IRN-C4FR-UD10400

MPN: UD10400

UPC: 851019008002

List: $179.00Save $9.51
$169.49

made-in-usa-flag Made in USA

Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Ultradyne C4 Flip-Up Rear Sight

Designed for the discerning shooter who wants the highest quality from their AR 15 Parts, the Ultradyne C4 Flip-Up Rear Sight works on a dual-aperture system. Creating a purely concentric sight picture with an inner aperture and outer circle, you can acquire and switch targets quickly and easily. The elevation adjustments are for every 50 yards, up to 600 yards, and they match the ballistics paths of standard M193 ammo, so you can count on consistent results. They Ultradyne C4 Flip-Up Rear Sight even have an interchangeable 0.070" Aperture and Ghost ring for further customization.image

Specifications for Ultradyne C4 Flip-Up Rear Sight:

Manufacturer: Ultradyne
Color: Black
Condition: New
Sight Mounting Orientation: Top Mounted
Sight Position: Rear
Gun Make: AR Platform
Front Sight Color: REAR SIGHT ONLY
Rear Sight Color: Black
Deployable: Yes
Fabric/Material: 4140 CrMo Steel, 7075 Aluminum
Included Accessories: None
Illumination Color: None
Hand: Ambidextrous
Mount Type: Picatinny
Country of Origin: USA
Attachment Type: Picatinny

Features of Ultradyne C4 FOLDING REAR SIGHT:

  • Purely concentric sight picture with an inner aperture and outer circle for easy alignment
  • Elevation Adjustments that match ballistics paths of standard M193 ammunition
  • Elevations adjustments in 50 Yard increments out to 600 Yards, 18 MOA total
  • Windage-Adjustable with positive location marks, 1/2 MOA/Click
  • Interchangeable .070 Aperture and Ghost Ring
  • Spare aperture conveniently stores into windage knob
  • Strategic use of materials to maximize stregnth and minimize weight
  • 4140CrMo with Nitride Finish / CNC Machined 7075 Aluminum

Package Contents:

  • Ultradyne C4 Flip-Up Rear Sight

Ultradyne C4 Flip-Up Rear Sight Orderable Models

List of Orderable Models

  • Ultradyne C4 Flip-Up Rear Sight, Picatinny Mount, Black, UD10400 , MPN: UD10400 , UPC: 851019008002 , Code: 3HE-IRN-C4FR-UD10400

Ultradyne C4 Flip-Up Rear Sight Unavailable & Discontinued Models

List of Unorderable Models

  • Ultradyne C4 Flip-Up Rear Sight, Picatinny Mount, Brown, UD10420 , MPN: UD10420 , UPC: 851019008026 , Code: 3HE-IRN-C4FR-UD10420
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Last updated 2026-07-05 UTC.