FX Impact Power Block/Plenum Upgrade Kit(For MKI & MKII Impacts)
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The FX Impact MKI and MKII are fantastic rifles for their time, and even hold up in the accuracy depart even today. The only thing these rifles leave their owners wanting for is a bit more power! With the new power block/plenum upgrade kit, you can reach much better velocities and FPE. The larger 72cc plenum gives you more power using lower pressures, and the new power block has been ported and polished hot-rod style to deliver that pressure much more efficiently. This kit is great if you are looking to get into Slug shooting with your older FX Impact Rifle.
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