FX Impact Tuning Hammerspring
FX Impact Tuning Hammer Spring
27 Reviews | Add review
Power tuning hammerspring for your FX Impact MKI or MKII. *** WORLD WIDE SHIPPING PER ENVELOPPE ***

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€ 7,95
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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 prefer to use this spring over the factory spring when you use the powerplenum in the MKII

Also it makes a perfect combination with our FX Impact Tuning Valve Return Spring


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To reduce costs we use worldwide shipping per untracked enveloppe for this item.
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André - 08-03-2022 21:12

With this spring and the huma high pressure regulator. The V2 from huma and slug probe. The mk2 shoots now 1005fps with the 600 mm .30 barrel with the fx hybrid at 170 bar. Before it was 833fps at 120 bar and more pressure was a lower speed.

Neil - 03-02-2022 13:26

Always quality parts help produce over 1000 fps for my FX Dreamline

Nazrul Islam - 17-08-2021 23:21


Adam - 31-03-2021 16:11

This hammer spring is much stiffer than the original, it makes a harder hit! Use with slug power kit makes big different! 😉 Recommend! Thanks Huma-Air!

Bryan - 10-03-2021 13:17

Great quality springs it really increases the power curve for heavy slugs

Kikopower - 02-03-2021 17:36

Great add on to obtain the best adjustability out of your FX Impact. This spring will let you go from high power at higher reg pressures to lower power levels. Highly recommended and a must after upgrading to the Power Plenum kit

William Rawley - 01-03-2021 17:19

Great product,usual great service !

Mark - 28-02-2021 00:39

Great bit of kit well made and fast service

Dai jones - 18-01-2021 14:04

Products and service is A1 +++++
Will always come come back to this company for my FX parts.

Lewis - 09-01-2021 00:48

Excellent product, loads of slack on hammer adjustment still easily shooting over 900fps on min with jsb mk2 .25cal 150bar saving air that I couldn't do with factory spring! Thanks guys!

anthony mcdougall - 31-12-2020 09:07

Another well thought out quality upgrade to my FX Impact. HUMA lead the way in perfection.

Mohamed - 05-12-2020 18:12

Great quality products 👍

Trevor Pollock - 04-12-2020 09:12

I bought this spring to replace the standard spring in my .25 FX Crown as I have fitted a 8.5gram hammer weight & Huma extra high pressure regulator & 6.35mm valve seat.
The Huma spring is exceptional quality & postage to 13 days delivered to my door in Australia.
Exceptional team at HUMA.
You should all be very proud to work for such a company.
I hope they look at making the same power spring &
valve stem they have made for the FX IMPACT for the FX CROWN.

Dirk Roosendaal - 20-11-2020 14:37

Werkt prima, samen met de dualflow tf poort en de pin probe heb ik de regulator druk van 135 bar terug naar 105 bar kunnen zetten zonder veel snelheid te verliezen

bao khanh - 20-11-2020 08:58

Very good product that Huma gave to thank you

Henrik - 10-11-2020 16:20

Great product, works great and fast shipping. 👍

Georgios - 04-11-2020 17:26

Wow....almost to much power, after changing the PP stock hammerspring out with the Huma one! almost to much power 😁 perhaps I would need to get the rubber ball for the valve adjuster spring, to reduce power when just plinking in the backyard. One will need to re adjust the hammerspring, reg pressure and valve adjuster/stop. Basically recalibrate the gun, and finding the sweetspot/hamronics again.

Ray - 02-11-2020 09:39

Upgrade over the one that FX supply with the Power Plenum Kit - this is needed for the higher reg pressures and f/sec results.

Francisco A. C. - 27-10-2020 15:15

works great

Abdulwahab - 22-10-2020 08:12

increase my gun 55 fps

Tom Ramos - 20-10-2020 12:34

Perfect for increase the speed of FX impact.
This spring+huma regulator +hi flow transfer fort and pellet probe
50grains at 1017 fps. Nice

Giorgos - 10-10-2020 23:46

It´s amazing so much more power a simple spring can produce! on the other hand, Huma always finds new ways of pressing the limits!
Always quick delivery and the best support!
Huma Rocks!

Daniel - 29-09-2020 20:12

Yes love this fits well for my gun and come very fast

Francisco - 21-09-2020 11:40

Excellent, it took a while to arrive, due to the pandemic situation we are in ... I haven't installed the spring yet. I hope it will increase the speed ....

Bodo - 07-09-2020 05:04

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.

Howard - 07-09-2020 02:42

Great Product, Fast Shipping Service, and SUPER Level of Customer Service. I will continue to make my purchases here.

Paul - 21-08-2020 22:53

works great