Ultradyne C4 and C4 Dynamount Adjustable Backup Iron Sights

Hrachya H
by Hrachya H
Ultradyne C4 and C4 Dynamount Backup Iron Sights (2)

Ultradyne is a bit of a mystery to me. This company’s backup iron sights and muzzle brakes almost simultaneously appeared on Brownells and MidwayUSA websites, but I couldn’t find the website or any other signs of this company’s presence on the Internet. That’s quite unusual for a modern company, isn’t it? At any rate, let’s take a look at the iron sights they make which have some really interesting features.

Ultradyne C4 and C4 Dynamount Backup Iron Sights (1)

Let’s talk about the mounting methods of front sights first. That is what distinguishes the C4 model from C4 Dynamount. The C4 versions mount to your standard 1913 Picatinny rails – nothing special there in terms of mounting to the weapon. However, C4 Dynamount front sight has a quite an interesting mounting system. It mounts to the barrel of the weapon by being sandwiched between the Ultradyne muzzle devices and the barrel itself. There are also holes in the rear of the muzzle devices and a corresponding small lug on the Dynamount front sight which allow indexing the front sight either vertically or at 45-degree angle to the left or right.

Ultradyne C4 Dynamount front sight

The front sight post also has an interesting design. Its tip represents a sphere with two perpendicular holes machined all the way through it resulting in sort of a perforated spherical shape. With the aperture rear sight, the sight picture becomes a “circle in a circle”. The Ultradyne front sights are also windage and elevation adjustable. The elevation adjustments are done in 90-degree increments of the front sight post rotation which allows seeing through the holes at any position of the front sight post. In order to rotate the front sight post, you don’t need tools. All you need is to press down the spring-loaded winged front sight housing, rotate the front sight post to the desired position and release the housing which will lock the front sight post in place.

Ultradyne C4 and C4 Dynamount Backup Iron Sights (5)

The rear sight of Ultradyne iron sights is also folding and has both windage and elevation adjustability built into it. There are several aperture options which directly screw into the ghost ring base. Another clever design feature is the possibility to store the apertures right inside the elevation adjustment knob by simply screwing them in.

Ultradyne C4 rear sight

Ultradyne backup iron sights are made of 4140 steel and feature a nitrided finish. These sights are available in a variety of options – front and rear combo, front or rear sights separately, multiple front sight and muzzle brake combinations etc. Instead of writing the prices of all these options, I’ll give you the links to the Brownells and MidwayUSA pages where you can see all the mentioned options and their prices. If you want to learn more about these sights watch the Brownells videos embedded below.


Images from www.brownells.com


UPDATE (2018, April 20): The company’s website is www.ultradyneusa.com

Hrachya H
Hrachya H

Managing Editor Being a lifelong firearms enthusiast, Hrachya always enjoys studying the history and design of guns and ammunition. Should you need to contact him, feel free to shoot him a message at Hrachya@TheFirearmBlog.com

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  • DaveC79 DaveC79 on Apr 20, 2018

    I purchased one of these front sight posts as soon as I saw this post on TFB. So there is one sale TFB generated for you guys :)

    I liked the medium sized muzzle device, so I purchased that combo. I had been searching for a solution like this for some time. Giving you a front sight attached to the barrel, as well as the ability to use an adjustable gas block. In my case this front sight will be used in combo with POF's dictator.

    I would just add that, many of us who would spend this much on backup irons also have suppressors. And as of now I would be in the market for an adapter to allow the use of this front sight post with a griffin armament taper mount. Save me from machining the end of the barrel, so I could drill, pen, and weld this sight post on.

    • Ultradyne Ultradyne on Apr 20, 2018

      @DaveC79 @DaveC79: Hey thanks so much for your purchase, we’re honored that you thought enough of our product to give it a try! If you’d like, send us your receipt to info@ultradyneusa.com and we’ll send you an extra front aperture of your choice!

      For choosing an appropriately-sized front aperture, this article from USA Shooting is a great reference: http://www.usashooting.org/...

      They are of course using globe sights but the info is still applicable to our precision folding sights.

      As for the suppressor mounts, that’s a complicated situation as many of the mounts are patented. We’ve been thinking about it though and you can believe we’ll let folks know should we come up with a solid solution!

  • John Daniels John Daniels on Apr 20, 2018

    Finally. A folding front sight with windage adjustment. That's awesome.

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