King Brown Laminate

A King has been crowned

With the all-new FX King FX Airguns keep pushing boundaries and keep innovating in a multitude of ways. The FX King is a powerful and pure hunting rifle ready to dominate the hunting fields.

Additional information


.177, .22, .25, .30, .35

Barrel Lengths

500mm, 600mm


500: Macro Plenum – 62 cc, 600: Magnum XL Plenum – 156 cc

Note: Scope & rings not included.

King Brown Laminate 500mm

FX Airguns Brown 500mm

King Brown Laminate 500mm LH

FX Airguns Brown 500mm LH

King Brown Laminate 600mm

FX Airguns Brown 600mm

King Brown Laminate 600mm LH

FX Airguns Brown 600mm LH

Proven Block

At its core, the FX King inherits the same true and tested block of the Panthera/Dynamic that’s capable of delivering a huge amount of power and energy. The FX king is an awesome pellets shooter without a doubt, but where it really excels is shooting slugs, thanks to its slug-based design and innovative valving. All while maintaining a slim and beautiful look as it sits in a custom-tailored GRS stock.

Over-the-Barrel Plenum System

With the large innovative over-the-barrel plenum system like you can find on other FX models the FX King can use the big volume to its advantage. Whether you want to shoot pellets or heavy slugs the FX King can handle it all while maintaining a sleek look in a traditional sporter stock.

Optimally Positioned Gauges

Dual-angled high-precision Wika gauges are set to monitor the bottle and regulator pressures. This way you can keep track of both pressures while shooting, even from the shouldered position out hunting. All so you won’t miss that all-important shot.

Quick-Tune System

It is impossible to imagine a powerhouse like the FX king without the ability to tune it the way you want. Therefore, the quick-tune system was a must and is seamlessly integrated into the ergonomic GRS rifle stock. Adjustments can be made quick, repeatable, and precise.


Even though this is a very classic sporter rifle we know you would love to mount accessories. So we have created accessory Picatinny rails on both sides of the FX King with the possibility to mount torches, bipods and more.

Handles Pellets & Slugs

With the deep magazine design adopted from the Panthera/Dynamic, the King can handle any kind of ammunition you throw at it up to 13 mm in length, pellets of any kind, shorter lighter slugs or heavy longer slugs are no problem.

30MOA Picatinny Scope Rail

All that is topped with a Picatinny scope rail that is 30MOA angled allowing you to have more usable elevation adjustments on your scope and reach out to longer distances with ease.


The King sits in a custom-tailored GRS stock, just like you would expect a King to wear a fine-tailored suit. Available in three superb colour options.

The Norwegian stock-making company GRS builds highly adjustable ergonomic laminate stocks with features like tool-less adjustments, a broad for-end and an ergonomic GRS grip, offset and angled, offering unsurpassed shooting comfort making the King stand out among the rest!

Comes with Hard Case

The FX King comes to you in a nice hard case with custom-cut foam that fits like a glove protecting your new rifle in transport and storage.

IMPORTANT FX CARE & HANDLING: Below are vital tips to ensure the proper care of your airgun, and be sure to give the FX Airguns Owner’s Manual a thorough read.
• Do not fill above manufacturer’s set maximum bar pressure as printed on the airgun.
• Do not discharge the airgun without air in the system.
• Read the FX Owner’s Manual and familiarise yourself with decocking the rifle.
• Only use pure silicone oil, silicone grease, and a recommended pull through to clean or lubricate the rifle.

 Muzzle energy listed in the specifications of each rifle is for maximum setting. Due to differences in regulations the rifle is often produced with a lower muzzle energy from the factory. Contact your dealer for more info about muzzle energy in your state.



   COCKING SYSTEM    Right hand positioned sidelever with ambidextrous mount to relocate
sidelever on left side for lefthanded shooters
   MAGAZINE TYPE    Removable high capacity, easy load.
Newly developed deeper lid to accommodate longer length slugs.
Maximum ammunition length, 13 mm (0,51”)
Made in durable injection-moulded POM
21 shot when Cal .177
18 shot when Cal .22
16 shot when Cal .25
13 shot when Cal .30
10 shots when Cal .35
   STOCK    GRS Laminate stocks
– Adjustable cheek piece
– Adjustable recoil-pad
– Tool-less adjustments
– Ergonomic grip
– Green Mountain Camo
– Nordic Wolf Laminate
– Brown
   CALIBRE    4,5 (.177)
5,5 (.22)
6,35 (.25)
7,62 (.30)
9,00 (.35)
   BARREL    500: Superior STX barrel liner
600: Superior Heavy STX barrel liner
   SHOT CAPACITY    500:
4,5 (.177) N/A
5,5 (.22) 180 shots with 15.89 gr pellet at 900 fps
6,35 (.25) 90 shots with 25.39 gr pellet at 900 fps
7,62 (.30) 70 shots with 44.75 gr pellet at 860 fps
9,00 (.35) 30 shots with 81 gr pellet at 840 fps
4,5 (.177) N/A
5,5 (.22) 128 shots with 22 gr hybrid slug at 900 fps
6,35 (.25) 96 shots with 26 gr hybrid slug at 900 fps
7,62 (.30) 56 shots with 44,5 gr hybrid slug at 900 fps
9,00 (.35) 26 shots with 68 gr hybrid slug at 900 fps
   FILL PRESSURE    Max 250 bar (3625 psi)
   SAFETY    Switch style
   OPTICS    Picatinny rail with built in 9 MIL/30 MOA angle
Marked with figures on the right side for easy repositioning of optics
   MUZZLE    Built-In Shroud system (variations may occur depending on country)
   PRESSURE GAUGE    Dual Angled Gauges:
Air tube pressure WIKA
Regulator pressure WIKA
   TRIGGER    Adjustable Match Trigger
Trigger blade can be adjusted in reach, height and rotated to set the blade in an angle
   ENERGY    500:
4,5 (.177) N/A
5,5 (.22) up to 70 ft/lbs with 34gr slug at 960 fps
6,35 (.25) up to 80 ft/lbs with 43.5gr slug at 910 fps
7,62 (.30) up to 110 ft/lbs with 64gr slug at 880 fps
9,00 (.35) up to 135 ft/lbs with 81gr pellet at 865 fps
4,5 (.177) N/A
5,5 (.22) up to 82 ft/lbs with 34gr pellet at 1040 fps
6,35 (.25) up to 91 ft/lbs with 43.5gr slug at 970 fps
7,62 (.30) up to 130 ft/lbs with 64gr slug at 1020 fps
9,00 (.35) up to 173 ft/lbs with 93gr slug at 915 fps
Note: above figures are maximum FAC Power output using tungsten hammer.
   AIR CAPACITY    480 cc air cylinder + plenum volume
   AIR CYLINDER    Carbon fibre wrapped air tank, removable
   LENGTH    500: 970 mm
600: 1075 mm
   WEIGHT    500: 3,45 kg
600: 3,6 kg
   CHARGING    Rear Foster Quick Disconnect, dust cap included
   MORE FEATURES    AMP MkII Regulator
Externally Adjustable
Quick Tune System
Micro & macro adjustment of hammer spring tension
Dual accessory rails
Picatinny on both sides
Comes delivered in a tailored cut out case
   PLENUM    500: Macro Plenum – 62 cc
600: Magnum XL Plenum – 156 cc