FX Impact M4 Compact .177 PCP Bullpup Air Rifle, 500 mm STX Superior Barrel, Regulated, Black, 38+1
This FX Impact M4 Compact stands out as a regulated PCP bullpup in .177 caliber with the FX Power Block and 75 cc Power Plenum 750. It features a 500 mm (19.7 in) Smooth Twist X Superior barrel that is free-floating and shrouded, a Quick Tune System with both macro and micro adjusters, and a high-capacity 38-round magazine. Built on a hard-anodized aluminum frame in black and made in Sweden, it comes with its factory hard case, manual, and spare parts.
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 Details: The air tank requires a refill prior to use.
What’s Included
- FX Airguns factory hard case (original)
- FX Impact M4 instruction manual
- 1x FX Airguns .177 rotary magazine (38-round, factory type)
- FX Airguns genuine parts bag with spare O-rings and a fitting
This compact bullpup is a regulated pre-charged pneumatic design that incorporates the FX Power Block paired with the 75 cc Power Plenum 750 for consistent performance. The system is monitored by a WIKA pressure gauge with a maximum fill pressure of 250 bar and filled via a Foster-style QD port.
The 500 mm FX Smooth Twist X Superior barrel is free-floating and shrouded, capped by a knurled front cap. This setup is designed for stability and reduced report while maintaining the easy barrel and liner service FX is known for.
Fine tuning is straightforward with the Quick Tune System, featuring a macro wheel and a micro adjuster. The two-stage, adjustable Quick Set Trigger supports precise control, and a manual safety provides straightforward operation.
Handling is streamlined by the right-side extended sidelever and the compact bullpup layout. The hard-anodized black aluminum frame and receiver, skeletonized stock with rubber buttpad, and textured pistol grip contribute to a stable, ergonomic shooting platform. A full-length top Picatinny rail and accessory rails on the forend offer mounting flexibility, and the transparent rotary magazine provides a 38+1 capacity in .177 caliber.
This rifle matches the case label configuration: Impact M4 .177 EXP Black – Compact, product code IM4-450306-002-00, and includes the original factory case and documentation from FX Airguns in Sweden.