FX Impact Power Block Kit MkI & MkII inc 720cc Power Plenum
S83397
The FX Impact Power Block Kit for MkI and MkII rifles is an official FX Airguns upgrade designed to transform the way your Impact manages air. At the heart of the kit is the 720cc Power Plenum — a high-volume secondary air reservoir that replaces the standard plenum, significantly increasing the volume of air available between the regulator and the transfer port. The larger plenum smooths out the pressure curve, widens the usable power band, and gives the shooter more consistent shot-to-shot performance across a longer string. The power block itself integrates directly with the Impact's existing regulator and action, so fitment is straightforward for anyone familiar with the rifle's modular design. Whether you are tuning for maximum shot count on a woodland pest control session or dialling in a flat trajectory for longer-range work, the 720cc plenum opens up a wider adjustment range than the factory setup allows. Suitable for FX Impact MkI and MkII only — not compatible with MkIII or later variants.
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