First Look: Ultradyne C4 Sighting System

posted on April 26, 2018
For decades, backup iron sights designed for use on modern sporting rifles have followed the same traditional design used on iron-sighted guns for centuries. In these classic sight arrangements, a square-notch front post is centered inside a rear aperture. Now, Ultradyne is changing the way iron sights work with the launch of its unique C4 Sighting System, which is designed to mimic the concentric sighting systems used by Olympic competition shooters.

Using a unique "circle-within-circle" sight picture, the new system is designed to be much more intuitive than traditional sighting arrangements, enabling users to get on target much faster and with more precision than backup irons of the past. Both elements of the sighting system, front and rear, work together to provide this easy-aiming system. The novel design starts at the front sight, which uses an aiming post surrounded by two protective rings. However, rather than a squared-off tip, the top of the post features a bulbous, spherical shape with holes drilled through the middle, providing an aiming aperture on all four sides of the post. In addition to the 12 MOA front-sight post aperture, consumers can also purchase 8-, 10- and 14-MOA apertures.

Moving to the rear sight, an aperture-style peep sight works with the circle drilled through the front sight post to provide a series of concentric circles centered upon the target. To enhance precision above traditional irons, the rear sight ships with a set of replaceable apertures, one with a 0.070-inch opening and another with a 0.050-inch opening. The unique design of the rear sight enables users to store the spare aperture into the windage-adjustment knob, allowing it to be on-hand whenever needed. One of the other benefits of this unique sighting arrangement is the parallax-reduction benefits found with the use of a front aperture, ensuring greater precision.

Ultradyne also recognized the benefits of having a greater sight radius beyond what's possible with a traditional railed fore-end. To increase the overall sight radius, the company developed its unique Dynamount attachment system. While standard Picatinny rail attachments are available with both front and rear folding sights, users can transform and enhance their sight radius by using the Dynamount system to place the front sight near the muzzle. The clamp attaches onto the threaded portion of the barrel with the help of the company's muzzle devices. The added benefit of this arrangement is that it can be used in a 45-degree offset position for backup sights. Options are available for .223- and .308-size barrels.

The Ultradyne C4 Sighting System is adjustable for windage and elevation, with the front sight providing 28 MOA of total elevation adjustment in 0.25-MOA increments and the rear sight providing 40 MOA of windage adjustment and 18 MOA of elevation adjustment in 0.5-MOA increments. The sights themselves are machined from a combination of 4140 chrome-moly steel treated with a nitride finish and 7075 aluminum with a hard-anodized finish. The front sight weighs in at 2.2 ounces, while the rear weighs 2.5 ounces. The suggested retail price on the Ultradyne C4 front sight starts at $129, while the rear sight retails at a suggested price of $154.


handgun with red dot sight
handgun with red dot sight

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