FX Impact M4 PCP Bullpup Air Rifle

The Icon Reborn – Sharper, Stronger, Smarter
 
Since its debut in 2015, the FX Impact has redefined what modern airguns can achieve. A true game-changer in both form and function, it quickly cemented its place as one of the most versatile, accurate, and innovative air rifles on the market. Now, with the release of the FX Impact M4, FX Airguns has pushed the platform even further—enhancing performance, rigidity, comfort, and control, all while maintaining the iconic aesthetics that shooters around the world know and trust.
 
What’s New in the Impact M4?
🔧 FX Quick Set Trigger (QST)
A revolutionary addition, the Quick Set Trigger allows instant adjustment between multiple trigger profiles—Hunter, Match, or Standard—all with a simple screw tweak. No upgrades, no swapping units. Just dial in your preference and shoot.
 
🧱 Improved Rigidity
The redesigned top plate is thicker and stronger, enhancing the structural integrity of the platform for a more solid, consistent shooting experience—especially noticeable under heavy use or competition stress.
 
✋ Refined Grip
The all-new FX Grip features a more sculpted palm swell, integrated beavertail, and a secure AR-style mount. It feels natural in the hand and offers improved ergonomics for both target shooting and field work.
 
💨 AMP Regulator with Brass Piston
Now fitted with a brass-piston AMP regulator, the M4 offers faster refresh rates, better consistency, and durability under higher fill pressures—rated to 170 BAR working pressure.
 
🔄 Redesigned Magazine
High-capacity magazines have been reengineered using stronger materials and a smoother rotating mechanism, ensuring reliable cycling even when loaded with heavier slugs.
 
🔭 Extended Optics Rail
The integrated dovetail and extended Picatinny scope rail give you ultimate flexibility for scope positioning, with perfect alignment and improved rigidity.
 
🎯 Design Touches
Small but meaningful refinements across the chassis—like functional cutouts, sleek lines, and improved access points—make the M4 as practical as it is good-looking. It’s evolution, not revolution—just as it should be.
 
Key Features:
FX Quick Set Trigger (QST) – switch between Match, Hunter, or Standard trigger profiles with one screw
Side Lever Action – ambidextrous mount, smooth right-hand operation
Carbon Fibre 480cc Bottle – light and high-capacity
Adjustable Recoil Pad – for perfect shoulder fit
Dual WIKA Pressure Gauges – monitor both regulator and main tank pressure
Superior STX 600mm Barrel – renowned FX accuracy
Foster Fill Port – quick and easy refilling
Detachable Muzzle Brake / Moderator Adapter
Picatinny Scope Rail with Adjustable Positioning
Delivered in a Custom Hard Case
 
Specifications:
Calibres Available: .177 (4.5mm), .22 (5.5mm)
Magazine Capacity:
 – .177: 35 shots
 – .22: 28 shots
Shot Count Per Fill (Approx.):
 – .177: up to 375 shots
 – .22: up to 330 shots
Fill Pressure: Max 250 BAR (3625 PSI)
Air Cylinder: 480cc Carbon Fibre Bottle
Barrel Length: 600mm
Overall Length: 860mm
Weight: 3.1kg (6.85 lbs)
Trigger: Fully Adjustable QST
Safety: Switch Style
Optics Rail: Full-Length Picatinny (adjustable mount)
Construction: Aircraft-grade aluminium with reinforced top plate
Charging Interface: Foster Quick Disconnect
 
Final Thoughts
The FX Impact M4 doesn’t just build on a legacy—it refines it. From benchrest to field, it’s a serious platform built for shooters who demand nothing less than world-class precision, adaptability, and control. Whether you're pushing pellets through paper or slugs through steel, the M4 ensures you’re doing it with the best FX has ever offered.