Power tuning Hammer spring for your FX Impact MKI or MKII

This hammerspring has a bit more higher powercurve compared to the MKI hammerspring what will give you more flexibility and power adjustment options when using the powerwheel of your FX Impact.
It's great when you want to tune your FX impact for slugs or hybride slugs and we preffer to use this spring over the factory spring when you use the powerplenum in the MKII

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Works fine to make a .25 cal Dreamline Classic PP to shoot NSA 27 gr at 980fps, at 125 bar reg with not totally maxed capacities sub MOA at 65 yards.
Nice little tool that really works well in the Dreamline .25 for 25 full power shots. Original spring in the same setup ranged for a max speed of 955fps.