TandemKross Eagle Eye Fiber Optic Sight Set for Ruger Mark Series
If you’re looking to upgrade the stock sights on your Ruger Mark series pistol, the TandemKross Eagle Eye Fiber Optic Sight Set is a noticeable improvement. The fiber-optic rods are bright and easy to pick up, and the tall sight plane makes target acquisition faster. And they co-witness with most optics. After installing a similar system on my Browning Buck Mark, I’m convinced this is the ideal option. Between the two, you’re covered for most lighting conditions.
First Impressions
TandemKross builds them solidly, as expected. The rear sight is aluminum and fully adjustable for windage and elevation. The front is a tall fiber-optic tower, also aluminum. Both have an attractive matte black finish. They’re compatible with many Ruger Mark II, III, IV, and 22/45 models. Lightweight, simple, and clean – they look and feel like a high-quality upgrade right out of the box.
Installation of the Eagle Eye Fiber Optic Sights
Installation is straightforward if you’ve done dovetail sights before, but I would recommend caution when removing the factory rear sight. After loosening the set screws, mine had to be tapped out with a light mallet and a brass punch. Go from right to left. Insert the new sight in the opposite direction, making sure the specially-designed dovetail insert is in the correct orientation. Snug it down while verifying alignment.
Some Mark pistols have misalignment issues with the factory sights. To counter this, the rear sight has some rotational adjustment. With the body installed, flip the hinged sight into place and gently tighten it.. Keep the wrench handy for adjusting windage and elevation.
The front sight installation is easy: remove the factory screw, remove the sight. Before installed the new sight, swap the fiber-optic rod if you want a different color. Then set the sight into place and tighten down the screw. As always, pay attention to alignment. This is really a simple task, though I still recommend reading the instructions first.
Adjustment
Due to differences in ammo, choose your favorite ammo before zeroing. Bullet weight and velocity can affect point of impact, so it pays to start with whatever you use the most. Then select the distance for your zero – I usually start with 25 yards for pistols. Shoot some rounds, see where they land, and adjust accordingly. There is a top screw on the sight for elevation. And on the right side is a screw for windage.
Switching ammo may result in a change to the point of impact. If that happens, make note of any adjustments, so you can easily return to your original settings. Since I mostly shoot steel, cans, and expired fruit, I don’t need to worry too much about being off a little bit.
Range Performance with Eagle Eye Fiber Optic Sights
Once zeroed, the sights make a big difference. The fiber-optic rods are bright and easy to see, and the taller sight plane makes transitions between targets much faster. The rear adjustments let you fine-tune the zero. After a few rounds, hits became more consistent. Due to astigmatism, most red or green dot optics “bloom” a bit for me. So as much as I love a good reflex sight, I’m equally as comfortable with some quality fiber optics. My Viridian RFX15 allows for a perfect cowitness when direct-mounted to the TandemKross Shadow Mount. This gives me the best of both worlds.
Pros & Cons
Pros:
- Bright, tall fiber-optic sight picture for faster target acquisition
- Fully adjustable rear sight (windage and elevation)
- Durable aluminum construction without adding weight
- Compatible with most Ruger Mark series pistols
Cons:
- Rear dovetail removal requires patience or gunsmithing for best results
- Not all optics will cowitness (check first, if that’s a concern)
- Fiber-optic rods are wear items and may need replacement over time
My Verdict
If you want a better sight picture on your Ruger Mark series, the TandemKross Eagle Eye Fiber-Optic Sight Set is a worthwhile upgrade. It improves visibility, speeds up target acquisition, and the adjustability gives you confidence on the range. For the price, it delivers performance that outpaces stock sights. Just plan for a careful installation, and once it’s zeroed, it performs exactly as advertised.
As always, I’d like to thank TandemKross for providing their Eagle Eye Fiber-Optic Sight Set for my testing and evaluation.