FX IMPACT M4 Bronze With Extended Barrel 4.5mm / .177 cal

The FX Impact M4 Bronze with Extended Barrel (4.5mm / .177 cal) is a top-tier competition and long-range PCP air rifle built for shooters who demand absolute precision, power control, and modular flexibility. Crafted on FX’s latest M4 platform, it features an enhanced rigid action, improved ergonomics, and a striking bronze Cerakote finish that stands out while offering excellent durability. The extended barrel maximizes pellet stability and consistency, delivering exceptional accuracy shot after shot—ideal for match shooting, benchrest, and serious target practice. With its externally adjustable regulator, power settings, and refined trigger system, the Impact M4 allows shooters to fine-tune performance without tools, adapting effortlessly to different pellets and shooting styles. Engineered in Sweden with competition DNA, this rifle represents the pinnacle of modern airgun technology for elite and professional shooters. 🎯

FX Impact M4 Bronze – Extended Barrel

4.5 mm / .177 Cal – Technical Specifications

Manufacturer: FX Airguns
Model: Impact M4 (Bronze finish)
Caliber: 4.5 mm / .177

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Power & Operation

• Powerplant: Pre-Charged Pneumatic (PCP)

• Regulation: Dual-stage AMP regulator

• Max Fill Pressure: 250 bar

• Air Cylinder: Carbon-fiber bottle, approx. 580 cc

• Plenum: Large, externally adjustable power plenum

• Shot Count: Approx. 330–375 shots per fill (tune-dependent)

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Barrel & Accuracy

• Barrel System: FX Smooth Twist X (STX) interchangeable liner system

• Barrel Length (Extended): Approx. 800 mm

• Shroud: Integrated full-length barrel shroud

• Accuracy: Match-grade, competition-level precision

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Performance (Typical .177 Setup)

• Muzzle Velocity: Up to ~310 m/s (≈1020 fps)

• Muzzle Energy: Up to ~45–47 J (≈33–35 ft-lb)
  (Actual output depends on tuning, pellet weight, and regulations)

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Action & Controls

• Action: Side-lever cocking (reversible for left/right use)

• Trigger: FX Quick-Set adjustable trigger

• Safety: Manual safety

• Hammer System: Externally adjustable hammer spring & hammer weight

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Magazine & Feeding

• Magazine Type: High-capacity rotary magazine

• Magazine Capacity (.177): Approx. 34 pellets

• Single-Shot Tray: Supported

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Dimensions & Weight

• Overall Length: Approx. 1120 mm

• Weight: Approx. 3.3–3.4 kg (without optics)

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Rails & Ergonomics

• Top Rail: Full-length Picatinny rail (often with forward cant)

• Accessory Rails: Side and bottom Picatinny rails

• Grip: AR-style compatible grip

• Stock: Modular aluminum chassis with adjustable buttpad