Meet the Maztech X4-FCS Fire Control System

The Maztech X4-FCS or Fire Control System is probably the most ambitious optics accessory to hit the market in recent years. Rather than being just a mount, it acts as a full fire control system for your preferred LPVO. By combining onboard environmental sensors with ballistic data, the X4-FCS overlays a real-time digital reticle inside your scope. The result is an aiming solution that adapts to your rifle, ammunition, and conditions on the fly.

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Maztech designed the X4-FCS to integrate seamlessly with most 30mm LPVOs. At $3,495, this isn’t a casual purchase for most shooters, and pairing it with one of Maztech’s laser rangefinders unlocks its full potential. Even so, the concept is groundbreaking and pushes rifle technology into new territory.

The X4-FCS houses an Applied Ballistics solver and sensors for temperature, pressure, humidity, pitch, roll, and heading. By entering your rifle and ammunition data, the system calculates a ballistic solution and projects a compensated aiming reticle into your optic. It also shows your real-time heading, cant, and more, depending on what you choose to have displayed. 

Zeroing is handled like any traditional scope. Once the optic is zeroed, you simply move the digital overlay to match your crosshair position. From there, the system provides precise holdover and windage information.

The onboard display is daylight-readable and highly adjustable. I found the menus and controls to be intuitive enough that I hardly needed the manual. The button layout works well from behind the rifle, and the rotary knob gives positive clicks for navigating menus and settings. While the included manual is short and sweet, the full 100-page version is available online for those who want to deep dive into every aspect of this system.

Running the X4-FCS with a Trijicon Credo 1-6 FFP mounted in the 1.93” model, I appreciated how little bulk the system added. At 22.6 ounces with batteries, it brings some weight but doesn’t feel cumbersome on the rifle. Button placement is ergonomic for right-handed shooters.

One of the coolest features of the X4-FCS is how customizable the display is. Users can move and resize icons, tailoring the sight picture to their preference. Even without a paired LRF, I was able to quickly dial in distances from my handheld rangefinder and let the system generate real-time holdover data. The overlay works cleanly up to about 55 MILs of elevation before running off the display. Beyond that point, the system still provides the MIL/MOA values for elevation and windage, though it no longer shows the hold visually in the glass. For fun, I entered a max range of 5,500 yards with a 55-grain 5.56 profile, and the software kicked back a staggering 40,754.20 MILs of elevation. Obviously not a realistic shot, and probably further than a 5.55 could even go, but it shows the solver’s capability.

Brightness is another area where Maztech got things right. The display is adjustable enough to cut through glare on bright days with reflective backdrops, yet it also dims low enough for night use with a thermal clip-on. 

Ergonomics are solid overall, with well-placed buttons and a rotary knob that delivers crisp tactile feedback. The only downside here is the power button, which can be bumped accidentally and turn the unit on, draining the battery if you don’t notice. Thankfully, battery performance itself is strong. The system runs on two rechargeable USB-C 18650s or four CR123s, with a claimed runtime of a year at 10 hours per week. This equates to 520 hours of run time, which impresses me for a system such as this. However, this system also has a shake awake and auto off feature that can help either preserve battery, or awake this system instantly when needed.

In practice, the X4-FCS feels like a genuine force multiplier, particularly for shooters without deep ballistic knowledge. After a few minutes of entering my rifle and ammo data, the system was instantly generating accurate holds. That allowed me to push a 16-inch AR chambered in 5.56 well past its comfort zone. At 1,400 yards, cheap bulk ammo kept us from ringing steel, but the FCS still walked us close enough to prove the concept. It still gave our silhouette plenty of near misses.

Within 300 yards, the advantage is limited. With a standard 50/200-yard zero, a 5.56 stays inside a six-inch vital zone, making the digital overlay more novelty than necessity. Beyond that distance, though, the X4-FCS comes into its own. It eliminates guesswork, bypasses BDC limitations, and provides precise solutions tailored to any rifle and ammunition combination by delivering accuracy between etched reticle hold points where traditional optics fall short.

That said, pairing it with an LPVO does create some limitations. LPVOs excel at speed and close-to-midrange engagements but aren’t ideal for spotting or engaging targets at long distances. In many ways, the FCS feels designed for lobbing rounds farther than most LPVOs can realistically support. During testing with the Credo 1-6 FFP, the system itself worked well, but I could barely see my steel silhouette past 1,000 yards. Still, the FCS got me close at 1,400 yards while my bulk ammo danced around the target. 

While it may feel like the scope is now the limiting factor, that speaks volumes to the powers of the onboard ballistics. This system now gives people the ability to make good shots in that 300-800 yard range. Also, when paired with a 6mm ARC or a large frame gas gun, the bullets will be more capable of making consistent shots at extended distances. It is also not designed to be a replacement for a precision rifle. Rather a tool to extend the usability of standard rifle systems.

Maztech includes plenty of thoughtful details. The torque specs for the rings and base are engraved directly on the housing. This eliminates the need to reference a manual during mounting. The accessory kit comes with two rechargeable batteries, USB-C charging cables, and even a Bluetooth dongle. Maztech told me the dongle “is for future use with our upcoming PC app in case the user’s PC does not have built in Bluetooth.” However, it is also a failsafe for if app stores get rid of the companion app. Accessories such as remotes, diving board mounts, and, of course, the LRF, expand the system further.

Maztech clearly intends the FCS to be the hub of a modular ecosystem. On its own, it’s powerful, but pairing it with one of the company’s laser rangefinders unlocks its full potential. The X4-LRF comes in 2K and 15K versions. Ranging reflective targets to 2,000 or 15,000 meters respectively, and priced between $2,195 and $4,995. A short FCS-to-LRF cable ties them together cleanly. Once linked, the system provides exact ranges with precise holds updated in real time. A particularly slick feature is how the FCS accounts for rifle cant. Even when the rifle is rotated sideways, the digital reticle remains level to the horizon, ensuring your hold remains correct. 

When the Maztech X4-LRF is connected to the FCS, all I have to do is hit the range button. Then in less than a second the system applies the exact ballistic holdover using real-time environmental data. Without the LRF, I can still manually dial in an estimated distance, or input the range from a handheld rangefinder.

Maztech also built in several backup ranging features that keep the system useful even without the LRF. There’s an auto-adjusting BDC mode that provides holds at 400, 500, 600, 700, and 800 yards. These holds automatically adapt to the current environmentals and selected rifle/ammo profile, unlike a traditional etched BDC. On top of that, the FCS offers both a static man-size ranging reticle and an adaptive digital ranging reticle. This allows me to bracket a man-size target to get a more precise distance estimate. For those who want to see the system in action, I posted a short video to my Instagram page below:

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At $3,495 for the FCS alone, plus another $2,195 to $4,995 for a matching LRF, this setup is a hard sell for most civilian shooters. Within 300 yards, it doesn’t add much value. For hunting, I don’t see myself using this for any big game. However, it is pretty neat for coyote hunting with a thermal clip-on. Especially since dialing in elevation holds gets tricky after dark. Having my holdover shown in the display is pretty helpful. It also held zero great. I kept this rifle in the back of a side-by-side and drove over 30 miles on very rocky and rough trails. While the X4-FCS rubbed a hole through the tool bag, it never lost zero.

Where I see the X4-FCS excelling is in military applications. The ability to instantly project a ballistic solution into a soldier’s optic, combined with a ruggedized housing and modular accessories, could be a true force multiplier. It makes long-range shots accessible to shooters with minimal ballistic knowledge. This allows effective engagement at distances far beyond what a standard etched reticle can offer.

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The Maztech X4-FCS represents a big step forward in fire control technology. It’s not cheap, and for many shooters it won’t replace traditional optics or dope cards. But as a proof of concept and a working product, it delivers. The system provided accurate ballistic holds, adapted to conditions in real time.

For target shooters who want to experiment with cutting-edge gear, it’s an impressive tool. For military use, it could be a game-changer. Personally, I don’t plan to purchase the FCS, but the companion LRF units have shown real promise when paired with my bolt guns.

Maztech is pushing boundaries, and the X4-FCS is a glimpse of what rifle shooting technology is going to look like in the near future.

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