FX Airguns Impact M4 .25 Cal PCP Bullpup, Bronze/Tan, STX Shrouded Barrel, 16-Round Magazine System
The FX Airguns Impact M4 in .25 caliber brings the brand's modular, high-performance PCP design together with the Smooth Twist X Superior barrel system and the FX Power Block with Power Plenum 750. Finished in anodized bronze/tan over an aluminum chassis, this bullpup offers external power tuning, a right-side sidelever, and a full-length bridged Picatinny top rail. It is a clean, feature-rich example that shows only faint signs of prior handling.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are minimal markings from previous handling and use. The bore is bright and clean. Refer to pictures for a complete view of the rifle's condition.
What's Included
- FX Airguns detachable carbon-fiber air bottle
- Faux suppressor
The Impact M4 platform is built around an aluminum chassis finished in anodized bronze/tan, with a skeletonized butt, rubber buttpad, and a vertical adjustment knob for fit. A textured, finger-grooved pistol grip supports positive control, while the right-side sidelever delivers smooth cycling for its 16-round rotary magazine system.
FX’s Smooth Twist X Superior (STX) barrel system is paired with a shrouded barrel featuring a cylindrical endcap to help tame report. The barrel length is 25.75, and the bullpup PCP layout keeps overall length compact while maintaining barrel performance.
Power and tuning are central to this model. It features the FX Power Block with Power Plenum 750 and a Quick Tune System external power adjuster, allowing precise control over power settings. A right-side pressure gauge with a 250 bar max marking provides immediate status at a glance.
Topside, a full-length bridged Picatinny rail offers solid mounting for optics, and an additional right-side Picatinny segment supports accessory placement. The Quick Set Trigger is adjustable, and a manual safety adds straightforward, reliable handling. The detachable carbon-fiber bottle supports the PCP air supply and rounds out the rifle’s well-integrated system.
Made in Sweden, this Impact M4 combines modularity with advanced barrel technology and user-adjustable power in a clean, bronze/tan package that is ready to configure for your preferred .25 caliber setup.