FX King Synthetic Airgun
Price range: $2,085.99 through $2,150.99
Overview
The FX King Synthetic Airgun is a high-performance hunting air rifle built to deliver serious power, consistency, and adaptability. Designed around FX’s latest innovations, it offers a refined shooting platform capable of handling a wide range of applications.
At the core of the platform is the Dynamic Plenum system, providing consistent regulated pressure while increasing overall rigidity. Combined with the integrated Quick Tune system, shooters can easily fine-tune performance to match their preferred ammo and shooting style. Whether for hunting, target shooting, or competition, this platform is built to perform.
Click on the tabbed section below for information on Key Features, Performance Advantages, and Specifications for either the 500 mm or 600 mm barrel lengths for the FX King Synthetic Airgun.
500mm Features
500mm Performance
500mm Specifications
600mm Features
600mm Performance
600mm Specification
- FX Quick Tune system integrated into the stock for easy on-the-fly adjustments
- Dynamic Plenum technology improves consistency and platform rigidity
- Precision 500mm barrel with Superior Liner (600mm with Superior Heavy Liner also available)
- AMP MKII (Adjustable Match Precision) Regulator
- Dual WIKA gauges display bottle and regulator pressure at a glance
- 30 MOA Picatinny top rail plus side Picatinny rails for accessories
- Adjustable 2-stage match trigger
- Reversible sidelever action for left- or right-handed shooters
- Rugged synthetic stock built for field use
- Up to 950-960 FPS in .177/.22 caliber, and up to 130-173 FPE in .30/.35 caliber for versatile power across five calibers
- Shot counts ranging from 180+ shots (.177) down to ~30 shots (.35), depending on caliber and power level
- 480cc carbon-fiber wrapped removable bottle with 250 BAR (3,625 PSI) fill pressure for extended range time
- Dynamic Plenum and AMP MKII regulator combine for consistent, repeatable shot-to-shot performance
- Quick Tune system allows on-the-fly adjustment to match ammo and shooting style
| Spec | .177 | .22 | .25 | .30 | .35 |
|---|---|---|---|---|---|
| Velocity | Up to ~950 FPS | Up to ~960 FPS | Up to ~910 FPS | Up to ~880 FPS | Up to ~865 FPS |
| Energy | 20 FPE | 82 FPE | 91 FPE | 130 FPE | 135-173 FPE |
| Shot Count per Fill | ~180+ shots | ~150-180 shots | ~90 shots | ~70 shots | ~30 shots |
| Magazine Capacity | 21 rounds | 18 rounds | 15 rounds | 13 rounds | 10 rounds |
| Spec | Detail |
|---|---|
| Barrel Length | 500mm (Superior Liner) |
| Fill Pressure | 250 BAR / 3,625 PSI |
| Air Cylinder | 480cc carbon-fiber wrapped, removable |
| Regulator | AMP MKII (Adjustable Match Precision) |
| Gauges | Dual WIKA (bottle + regulator) |
| Rail | 30 MOA Picatinny top rail, side Picatinny rails |
| Trigger | 2-stage adjustable match trigger |
| Action | Sidelever, reversible |
| Overall Length | 970mm (38.2 in) |
| Weight | 3.05 kg (6.7 lbs) |
| Stock | Synthetic |
- FX Quick Tune system integrated into the stock for easy on-the-fly adjustments
- Dynamic Plenum technology improves consistency and platform rigidity
- Precision 600mm barrel with Superior Heavy Liner
- 156cc Magnum XL Plenum paired with 480cc carbon fiber bottle
- Dual WIKA gauges display bottle and regulator pressure at a glance
- 30 MOA Picatinny top rail plus side Picatinny rails for accessories
- Two-stage adjustable match trigger (factory set to ~11-15 oz)
- Reversible, straight-pull sidelever action
- Rugged synthetic stock built for field use
- Up to 1,040 FPS in .22 caliber, and up to 150+ FPE in .35 caliber for exceptional versatility across five calibers
- Shot counts ranging from ~128 shots (.22) down to ~26 shots (.35), depending on caliber and power level
- 480cc carbon fiber bottle plus 156cc Magnum XL Plenum with 250 BAR (3,625 PSI) fill pressure for extended range time
- Dynamic Plenum design and stainless internals combine for consistent, repeatable shot-to-shot performance
- Quick Tune system allows on-the-fly adjustment to match ammo and shooting style
- Longer 600mm barrel maximizes velocity and energy for extended-range performance
| Spec | .177 | .22 | .25 | .30 | .35 |
|---|---|---|---|---|---|
| Velocity | ~920 FPS | ~1,040 FPS | ~970 FPS | ~1,020 FPS | ~915 FPS |
| Energy | Up to 30 FPE | Up to 82 FPE | Up to 91 FPE | Up to 130 FPE | Up to 150+ FPE |
| Shot Count per Fill | — | ~128 shots | ~90-96 shots | ~56 shots | ~26 shots |
| Magazine Capacity | 21 rounds | 18 rounds | 15 rounds | 13 rounds | 10 rounds |
| Spec | Detail |
|---|---|
| Barrel Length | 600mm (Superior Heavy Liner) |
| Fill Pressure | Max 250 BAR (3,625 PSI) |
| Air Cylinder | 480cc carbon fiber bottle + 156cc Magnum XL Plenum |
| Gauges | Dual WIKA (bottle + regulator) |
| Rail | 30 MOA Picatinny top rail, side Picatinny rails |
| Trigger | Two-stage adjustable match trigger (~11-15 oz factory) |
| Action | Sidelever, straight pull, reversible |
| Overall Length | 42.0 – 43.5 in (~1075mm) |
| Weight | 6.85 – 7.4 lbs |
| Stock | Synthetic |