FX Harmonic Adjustable Barrel Tuner Shroud 600mm — Impact M3
S82904
The FX Harmonic Adjustable Barrel Tuner Shroud is a purpose-built accuracy upgrade for the FX Impact M3 fitted with a 600mm barrel. Developed in collaboration between FX Airguns and leading airgun tuners, it combines barrel dampening with a genuinely adjustable running weight, letting you dial in your rifle's harmonic signature for tighter groups at medium and long range. The shroud body is constructed from high-grade carbon fibre, which is stiffer than aluminium, resists heat expansion, and delivers superior de-resonating qualities — keeping point-of-impact consistent shot to shot. De-resonating rings at the shroud's base further reduce barrel vibration. The rotating running weight at the muzzle end adjusts tool-free; small rotational changes shift the weight distribution of the barrel system enough to noticeably improve group size. The kit includes three threaded end caps calibrated for .177/.22, .25, and .30 calibre, each acting as an air stripper and accepting a standard moderator thread. Designed exclusively for FX Impact M3 rifles running the 600mm barrel — do not fit the 500mm or 700mm variants.
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