The FX Quick Tune system is now integrated into the King’s GRS stock, allowing shooters to fine-tune based on personal ammunition preferences. Whether you’re into hunting, benchrest competition, backyard plinking, or field target, the King can handle it.

Powered by FX’s revolutionary Dynamic Plenum, you can expect consistent regulated pressure around the barrel, increasing the rigidity of the overall platform. It features dual-angled WIKA gauges on the left side of the block, which display bottle pressure and regulated plenum pressure at a glance. Other useful features include a 30moa Picatinny scope rail, adjustable trigger, and side Picatinny rails for mounting accessories like flashlights, lasers, bipod legs, etc.

The GRS stock is handmade in Norway and custom-designed specifically for the King.  Right-hand and (left-hand special order) configurations with an angled grip, bringing any shooter an ergonomic and comfortable shooting experience with excellent control in a variety of shooting positions.

Each FX King arrives in a high-quality hard case with custom-cut foam to provide a snug, safe fit during transport.

• .22 calibre (5.5mm) 
• 600mm Superior Heavy Liner barrel
• 1/2"x20 male threads at the end of the shroud
• 480cc 250 BAR bottle
• 156cc Magnum XL Plenum
• High-power, short impulse valve Dynamic Block
• Over-the-barrel Dynamic Plenum design
• Quick Tune System
• Fill pressure: 232 BAR/3,365 PSI
• Max. energy (700)**: 96 FPE (.22), 107 FPE (.25), 150 FPE (.30), 198 FPE (.35)
• Magazine capacity: 21 (.177), 18 (.22), 16 (.25), 13 (.30), 10 (.35)
• Includes one standard Side Shot magazine with deeper .51" lid for longer slugs
• Adjustable hammer tension power wheel
• AMP MKII (Adjustable Match Precision) regulator
• 2-stage adjustable match trigger
• Dual angled manometers: bottle and regulated pressure
• Picatinny optics rail with 30 MOA cant
• Foster Quick-Disconnect fill port
• Overall length: 42.3"
• Weight: 7.6 lbs.