Hardware Review: Riton 5 Primal 3-18x50mm

Frank Melloni

posted on November 19, 2025

News, New For 2025, Review, Optics

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For years, I have included some variation of the phrase “it’s also a lot of fun to shoot during the offseason” in most hunting rifle reviews. Well, if that’s the case, isn’t it fair to reason that scopes ought to be designed for the year-round? The growth of long-range hunting has morphed today’s sporting rifles, building them in the image of some of the most acclaimed target-shooting firearms. Widespread use of multi-purpose rifles like the AR-15 in the field has also demanded optics that are suited for a multitude of uses. Optics manufacturer Riton is well-versed in making riflescopes to serve either user, so building a crossover like the new 5 Primal 3-18x50 wasn’t too far of a stretch for them.

Riton uses a simple number system to categorize its products, with the “5” series being second from the top. Therefore, the new 3-18x is made with high-end HD (high density) glass set in a girthy 34mm main tube. Large for a hunting scope, the 34mm tube offers ample adjustment for shooters looking to reach farther without having to sacrifice a 100-yard zero (or closer). High-density glass helps with general resolution, especially in low-light conditions, which hunters meet at dusk and dawn. At 50 millimeters, the objective lens is oversized for a riflescope used for hunting but several millimeters smaller than most found on your typical longer-range target scope. Therefore, I believe Riton did a great job of striking a balance in this department.

When asked to explain the difference between hunting and target glass, my attention is drawn to the reticle and the turrets. Your average hunting scope is made to be zeroed, capped and left alone. Therefore, most are made with minimally marked turrets that aren’t readily adjustable. Reticles are usually simple crosshairs, in some cases including crude bullet-drop compensation hashmarks. The 5 Primal draws from all of this and delivers a package that is going to make everyone happy. For those who like to dial, the windage and elevation turrets are oversized and feature knurling to make them finger adjustable. The scope ships with caps to cover these up if you feel that is a liability in the woods. A parallax adjustment knob is located on the left side, which allows for target focus at any distance instead of setting the scope for 100 yards and leaving you to learn to live with that. Just outside that knob is a 12-position control that illuminates the reticle. Users have six levels of intensity to choose from with an off position in between each. On the topic of reticles, the 5 Primal houses a target-grade offering set into the first focal plane. This means that it zooms with magnification, making the holdovers true at any power level. When it’s dialed down to the low end it mimics a classic duplex, making it easy to see, even for aging eyes. Cranked up, it reveals a fine central aiming dot with .5 mil hash marks along the X and Y axes with 2 mil dots toward the bottom in a “Christmas tree” formation. Magnification is controlled via a ring on the ocular housing and is adorned with a throw lever that can be placed in one of two positions or removed altogether.

I decided to pair this versatile scope with an equally versatile firearm: a Rise Armament AR-15. Chambered in .223 Wylde, the package would make an excellent coyote rig while not limiting the AR solely to use in the field. Yotes in Central Pennsylvania aren’t as brazen as they are out West, so long shots on these dogs are fairly common. Using a pair of the company’s rings, I slapped it on in short order and headed to the range.

After zeroing at 100 yards with a 75-grain handload that I’ve perfected, I had a little more than 11 mils of elevation left to work with. That’s not bad, considering that I didn’t incorporate any canted hardware. This is enough adjustment for me to dial out to 900 yards, which is well beyond the distance that I would try to push a .223 Remington out to when flesh is involved. However, I’ve rung plenty of steel at this distance, so it was game on.

My next step was to reset the turrets, which only involved removing a hex screw and slipping each dial. With my zero preserved, I ran the knob to the bottom and then the top, counting 31 mils of total elevation adjustment. Then I ran it back and forth 10 times and reconfirmed my zero; it passed. Bringing the target into 25 yards, I shot the square before conducting a tall target test. The scope tracked flawlessly during both evaluations, and I enjoyed some of the sharpest clicks I’ve ever felt on an optic.

My test day began with 20-degree weather and ended at nearly 60 degrees, which gave me an excellent opportunity to experience internal fogging if there was any issue with the purging or sealing process. The scope held together just fine and exhibited excellent clarity during the morning hours, even when peering into the shadows of the forest. I finished the day by delivering 10 blows to both the bell and ocular to simulate poor handling or excessive recoil. This was done to check the scope’s ability to retain zero during rough use. Again, it prevailed, and I was indubitably impressed.

Riton’s 5 Primal crossover scope proved to be a handy piece of hardware, transforming a hunting rifle into a long-range rig or preserving a target rifle’s range prowess when adapting it to the field. It balanced features with function and checked every box that both the hunter and competitor require for success. I found it to make good on all of the manufacturer’s promises, and I can’t find a gun in my safe that it doesn’t belong on. I’ll leave it on the Rise for some more target work, but I’m sure this is also going to be a lot of fun to shoot during hunting season.

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