FX Airguns Impact M4 EXP Extended .35 Cal PCP Bullpup Air Rifle, 34 in STX Superior Barrel, Black
This FX Impact M4 EXP Extended stands out with its long 34-inch Smooth Twist X (STX) Superior barrel, FX Power Block with Power Plenum 750, and carbon-fiber air bottle built for a maximum working pressure of 250 bar. It is a .35 caliber, 18-round PCP bullpup with a bridged full-length Picatinny top rail, a short underside 1913 rail, and precise external tuning via the Quick Tune System. Made in Sweden, it pairs a left-side sidelever and Quick Set Trigger with a lightweight, all-black aluminum chassis.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Minor surface scratches and small exterior blemishes are present.
What's Included
- FX Airguns Impact series owner's manual
- FX factory hard case
- Detachable thread-on muzzle extension/moderator
- Air fill probe
- 1x 18-round FX Impact .35-caliber rotary magazine
The EXP Extended configuration equips this Impact M4 with a 34-inch STX Superior liner barrel that is shrouded and threaded. A removable endcap/moderator is included, and the threaded muzzle provides flexibility for sound moderation and tuning within the platform’s design.
Power and air management are anchored by the FX Power Block with Power Plenum 750, a carbon-fiber air bottle, and a WIKA pressure gauge. The rifle is rated for a maximum working pressure of 250 bar, giving the shooter ample headroom for consistent performance.
The Quick Tune System external power adjuster allows fast, precise regulation of output without disassembly. Operation is smooth and fast with the left-side sidelever, and control is straightforward via the left-side Safe/Fire manual safety and the crisp Quick Set Trigger.
The bullpup chassis is aluminum with a black finish, featuring a skeletonized stock, rubber buttplate, and a textured pistol grip. A bridged full-length Picatinny top rail offers continuous mounting space, while a short underside 1913 rail supports accessories as needed.
This .35 caliber, 18-round repeater ships with an FX rotary magazine and arrives in the FX factory hard case. It carries the "Made in Sweden by FX Airguns" marking and the factory part number IM4-900306-029-00.