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Questions & Answers
Will these fit an A2 front sight? Manufacturer Answer

The threads on the post are 8-36 (.164) UNF-2A threads. It should fit in most A2 front sights.

by Ultradyne USA, Manufacturer, October 9, 2025
Will these fit a standard troy front folding sight? Expert Answer

No, these are only compatible with the Ultradyne C4 front sight.

by Nick B., Gear Expert, September 2, 2021
Customer Reviews
Helpful Positive Review Great concept for front sight by Andrew, Verified Owner, July 29, 2025
My eye and brain prefer circle-in-circle sighting systems as opposed to post in peep sighting. I bought this to modify and use with a standard front sight tower instead of the ultradyne ecosystem. Just a little bit of time with a file to open up the ...
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1/1 found this helpful
Helpful Positive Review Well, it worked by EN, September 7, 2021
I got this item because it fit the niche i was going for, and i like how it functions. It DOES work with troy folding sights which i was pretty happy about and i think its totally worth it. You do have to fight with an alan key/punch and twist the si...
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8/9 found this helpful
Helpful Negative Review Non-Standard Sight Adjustment by Slade, Verified Owner, January 14, 2021
The 2 standard front sight tools will not work on this and it doesnt come with a tool. The slots on the sight post are too small so you can fight it will a punch or allen key if you want. If you are able to work around it, be sure to get the largest ...
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9/11 found this helpful
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Product Info for Ultradyne C4 Front Sight Post

Additional aperture option or replacement front sight post for the C4 sighting system.image

Specifications for Ultradyne C4 Front Sight Post:

Manufacturer: Ultradyne
Sight Position: Front
Front Post Shape: Aperture
Front Sight Color: Black
Rear Sight Color: Front Sight Only
Fabric/Material: 4140 CrMo Steel
Finish: Nitride
Color: Black

Package Contents:

  • Ultradyne C4 Front Sight Post

Ultradyne C4 Front Sight Post Orderable Models

List of Orderable Models

Ultradyne C4 Front Sight Post, 10 MOA, Black, UD10620 , MPN: UD10620 , UPC: 851019008224 , Code: 3HE-ARI-C4SP-UD10620
Ultradyne C4 Front Sight Post, 8 MOA, Black, UD10610 , MPN: UD10610 , UPC: 851019008217 , Code: 3HE-ARI-C4SP-UD10610
Ultradyne C4 Front Sight Post, 12 MOA, Black, UD10630 , MPN: UD10630 , UPC: 851019008231 , Code: 3HE-ARI-C4SP-UD10630

Ultradyne C4 Front Sight Post Unavailable & Discontinued Models

List of Unorderable Models

Ultradyne C4 Front Sight Post, 14 MOA, Black, UD10640 , MPN: UD10640 , UPC: 851019008248 , Code: 3HE-ARI-C4SP-UD10640
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