By Chris Turek - The UpNorth Airgunner
I’ve had the privilege of testing the FX Impact M4 since its launch right after RMAC 2024, and let me tell you, this airgun is a masterpiece. For years, the FX Impact platform has set the gold standard in precision airguns, and the M4 takes everything we’ve loved about this platform and pushes it to a whole new level. Whether you're into competitive shooting or pest control, the FX Impact M4 has something to offer everyone.
Prairie Dog Palooza: FX Impact M4 in Action
If you’ve ever wondered what the ultimate prairie dog hunting setup looks like, let me paint you a picture. Recently, I had the chance to join the Utah Airguns crew and the Saber Tactical Team in Utah for the Prairie Dog Palooza. Armed with the FX Impact M4 and some next-level optics, this trip was as close to perfect as it gets.
Let’s start with the centerpiece of the hunt: the FX Impact M4. This rifle doesn’t just perform—it excels. For this trip, I dialed in the M4’s Quick Set Trigger to a sweet spot that I’d describe as a little heavier than a competition setting but lighter than a traditional hunting trigger. One of the best features of the M4 the trigger flexibility. With the ability to fine-tune the trigger to your preference, you’re in complete control. And in prairie dog hunting, where you’re constantly engaging targets at varying distances, precision and customization are absolute game-changers.
Element Optics Laser Range Finder Module and the FX Impact M4
Now, let’s talk about the tech that truly elevated this hunt: the Element Optics Laser Range Finder Module. This piece of kit integrates seamlessly into your optics setup, providing real-time range readings with a single push of a button. Prairie dog hunting is unique—it’s all about switching from close-range 50 yard shots to stretching your rifle’s legs at 300 or even 400 yards. The rangefinder module made that transition seamless. With precise range data instantly at hand, I could make the necessary adjustments without breaking my shooting rhythm.
The Element Optics LR Module’s ability to display the range measurements directly on the screen of the module, which was mounted above the scope, is what really sets it apart. You’re not fumbling with extra gear or wasting valuable seconds figuring out distances. Instead, you’re maintaining focus, engaging targets, and sending shots with confidence. The synergy between the FX Impact M4 and the Element Optics module is almost too good to believe. I mean, when you’re smacking prairie dogs at 385 yards with Zan Slugs—ohhhhh ya, it’s a whole new level of precision airgunning.
Airgun Hunting Providing a Conservation Service
Performance aside, the trip itself was just plain fun. The Utah Airguns crew and Saber Tactical Team know how to combine top-notch gear with an unforgettable hunting experience. Prairie dogs scattered the landscape in every direction, and the challenge was in transitioning from a close shot one second to an extended-range shot the next. With every hit, there was that shared excitement and, let’s be honest, a little celebratory whooping. The farmers LOVED us being out there ridding this pest from the grazing land for their cattle.
One of the standout moments for me was taking down a prairie dog at close to 400 yards. With a quick push of the LR Module’s button, the range was confirmed, the shot was lined up in my crosshairs with the dial DOPE given to my by the range finder, and the M4 delivered flawlessly. The trigger broke cleanly, the slug flew true, and there it was—a textbook shot on a challenging target distance. THWACK! Moments like that remind me why I love this sport.
If you’re serious about precision airgun hunting, the FX Impact M4 and the Element Optics Laser Range Finder Module are a combo you need to experience. From their pinpoint accuracy to their user-friendly design, they’re tools built for performance and reliability. And when paired with great airgunner friends and a good hunt, they’re all you’ll ever need to turn a day in the field into a memory you won’t soon forget. So let's go over the new FX Impact M4 features specifically.
The Evolution of the FX Impact M4
What makes the FX Impact M4 so special? For starters, it’s not just a slightly improved M3. It’s a significant leap forward. FX Airguns took feedback from shooters worldwide and turned it into a game-changing platform. This isn’t just an update; it’s a complete revolution in airgun technology, and I’m here to break down why it’s worthy of all the buzz.
Precision Redefined: The M4 Trigger System
Let’s talk about the trigger—wow, FX absolutely nailed it here. The best way I can describe it is like snapping a perfectly taut wire; the break is clean, crisp, and precise. This isn’t just any trigger—it’s essentially three triggers in one, designed for competition, field hunting, and safety-focused setups.
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Competition Mode: Ultra-light, glass-rod precision. Perfect for high-stakes benchrest matches.
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Standard Mode: The classic FX Impact trigger we all know and love.
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Hunting Mode: A heavier trigger pull, ideal for those who want added confidence while hunting.
Whether I’m zeroing in on a target during a match or lining up a shot on game, this trigger system gives me exactly what I need for the situation.
Structural Brilliance: The Reinvented Top Rail
The redesigned top rail is another standout feature of the M4. Older models of the FX Impact sometimes had a bit of flex in the rail system. It wasn’t a major issue, but it was something FX addressed seriously. The new sliding Picatinny rail is a game-changer. It’s rigid, flex-free, and incredibly functional.
For someone like me who loves experimenting with scopes, this sliding rail is a dream. It adjusts forward or backward for perfect eye relief, making it ideal for speed competitions or custom setups. Plus, the dovetail design ensures the rail stays perfectly aligned every time it’s adjusted or removed. No more windage issues—just precision every single time.
The FX Amp Regulator: Power and Precision
The new regulator is a brass-piston, single-unit design, replacing the dual-regulator setup in the M3. Why does this matter? Simplicity and reliability.
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Single Regulator: Less complexity means fewer tuning headaches.
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170 Bar Capacity: Straight from the factory, it can handle up to 170 bar. That’s huge for high-power setups.
Whether I’m fine-tuning for heavy slugs or aiming for pellet accuracy, this regulator ensures consistent shot-to-shot velocity every time.
Magazine Overhaul: Built for Heavyweights
I’ve had my fair share of magazine issues in the past, especially with heavy projectiles, so the redesigned magazine in the FX Impact M4 was a welcome upgrade. It’s built to handle heavy-for-caliber slugs like the massive 42-grain .22-cal slugs I’ve been testing.
The internal mechanism ensures smooth rotation, even with oversized slugs, and the grooved top lid allows these heavy projectiles to fit perfectly. This new mag design is a game-changer for anyone shooting heavier ammo.
The FX U1 Grip: Comfort Meets Control
When it comes to grips, I’m pretty picky. I usually swap out OEM grips for something custom, but the new FX U1 grip has me rethinking that habit. With its larger palm swell and ergonomic design, this grip fills my hand perfectly, reducing any unwanted movement during trigger pulls.
The textured, non-slip surface and finger grooves add even more control. Whether I’m in the field or at the bench, this grip feels like it was made just for me. Honestly, it’s the best factory grip I’ve ever used.
Harmonic Tuning and the DonnyFL Yokozuna Advantage
Harmonic tuning has always been a fascinating part of airgun precision, and the FX Impact M4 makes it easier than ever. Add the DonnyFL Yokozuna airgun suppressor into the mix, and you’ve got a whole new level of tunability.
The Yokozuna allows you to add or remove baffle stacks to fine-tune the barrel’s harmonics. Each adjustment influences the vibrations, helping you find the perfect sweet spot for tighter groups and straighter flight paths. This suppressor, combined with the M4’s inherent tunability, transforms the rifle into a precision machine. Whether it’s for benchrest shooting or high-level competition, this setup delivers unmatched accuracy.
Field and Range Performance
I’ve tested two versions of the FX Impact M4: the .30-cal with a 700mm barrel and the extended 800mm version in .22-cal. Both setups exceeded my expectations, but they excelled in different scenarios.
.30-Cal Powerhouse
The .30-cal setup is a competition benchrest shooter’s dream. At 50 yards, I was drilling hole-in-hole groups, and at 100 yards, sub-MOA performance was the norm. Paired with the 1:40 twist liner and JSB 44-grain pellets, it delivered the kind of consistency and accuracy that makes this airgun so special.
.22-Cal Precision
On a prairie dog hunt in Utah, the 800mm .22-cal setup absolutely stole the show. Using 34-grain slugs, I was consistently hitting targets at 180 yards. The extended barrel and high-power tuning made it the perfect tool for long-range pest control.
Why the FX Impact M4 Stands Out
So, why upgrade to the FX Impact M4? Here’s what sets it apart:
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Versatility: Whether it’s hunting or competition, the M4 adapts to your needs.
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Innovation: Every feature, from the trigger to the regulator, addresses real-world feedback.
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Performance: This platform delivers consistency, power, and precision all in one.
For seasoned competitors and casual airgunners alike, the FX Impact M4 is a must-have.
Final Thoughts
The FX Impact M4 isn’t just another airgun—it’s a statement. FX Airguns has proven that they listen to their community and continuously push the boundaries of what’s possible. Whether I’m shooting pellets or heavy slugs, the M4 delivers performance that’s second to none.
So, if you’ve been on the fence about upgrading, take it from me: the FX Impact M4 is worth it. Grab one, hit the range, and see for yourself why this airgun is setting new standards.
