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I’ve been in touch with FX for some time about this issue, finally FX have now redesigned a new valve & plenum nose o-ring combination. Retailers should be receiving the new parts soon & new rifles will soon come with the newly redesigned parts 👍👍 Hopefully this will help everyone in the future.

Its not needed but it is recommended, the twist rate of the slug liner provides best results for heavy slugs, you'll likely see improved accuracy with the slug liner in.

Hi, Myra I got about 25% more shots so on my FAC higher power setup that worked out at about 6-8ish but obviously on lower setups you’ll get many many more.

Hi, The Huma regulator replaces the inbuilt FX regulator which is located behind the trigger / above the grip. You've probably adjusted the regulator pressure via the hex adjustment before. If you click on the link to the HUMA regulator in my post you will see there are fitting instructions & a...

Hi, yes it it makes a big difference, my .22 cal Impact M4 is tuned at 990-1000fps shooting a 34gr slugs, I could get it to go higher but the rifle isn't far off being maxed out as it is, if I make no changes at all and just install the ball it reduces to about 780fps, its a big difference and...

Hi, For the best results yes you will, the slug power kit comes with a pin probe to seat the slug better & more importantly it comes with a lighter spring and heavier hammer so it can hit the value harder & keep it open a little longer allowing more air through, which in turn provides more...

Yep I did the same process as yourself and found that solved the issue, I also lightly lubed the rod with silicone oil before putting it all back together, then a drop or two of silicone oil in the fill hose of my compressor just before filling the rifle up. It now takes just 2-3 shots to get...

Yes please, can you let me know your tune ? Thank you

What’s your best tune for 34gr slugs ? I’m using H&N .218 currently. My setup, is .22 Impact M4 700mm, Slug power kit, STX heavy liner, carbon sleeve. I’m wanting to get to somewhere near 990-1000 FPS ideally unless you have best results at lower FPS, can I ask what your reg is at, macro &...

Hi, What a great idea 💡👍 This looks like the perfect solution to me & it would be a straightforward swap too if you made them with the o-rings in place. Do you sell these ? Is so how much are they including shipping to the United Kingdom 🇬🇧 ? I’m really interested in purchasing one 👍

Yeh it’s 10-15 shots, but I’ve only had the rifle 3 weeks it’s only had about 400 slugs through it, I wouldn’t have thought a reg rebuild & polish would be required at such an early stage. Here the chronograph results from an overnight room temperature rest, (over 2x strings as pictured) 26...

Hi, yeah I may bleed the system and try a lower reg pressure at around 140 and slowly turning it up if needed. I’m wondering if the hammer is having to work to hard to hit the value, I guess there’s only 1 way to find out 👍

Hi, I’ve already got the heavier hammer installed as part of the FX power kit the latest power kit just has a hammer replacement heavier hammer now & not the weighted spacers that used to slot on the original hammer. Maybe a reduction in my reg pressure from 165 to say 150ish might help as the...

I’m wondering if someone can shed some light on this question. I’ve recently got an FX Impact M4 .22 700mm with slug power kit installed, heavy liner, carbon sleeve etc. If the rifle has been resting (but is room temperature) I notice it takes a good 10-15 shots for the velocity to get to...

Yes it seems a lot of dealers either don’t know this or aren’t informing their customers on this point. You will read that some people have just fitted the 300Bar bottle straight on without the 1st regulator and they report it works fine. However as FX have told me it’s not rated for it how...

As long as you like it, that's all that matters ;) It would be boring if we were all the same.

A wonderful scope, only to be ruined by a terrible looking parallax wheel 🤢 Sorry, just my opinion but those are an eyesore

I contacted FX directly to clear this issue up, several retailers appear to be providing poor information: My question to FX: Message: Hi, I'm not sure where to direct my inquiry. I just want to know if I can install a 300Bar bottle on an FX Impact M4 & fill it to 300bar without any additional...

Ahh that’s interesting 🧐 I contacted FX about mine & connecting a 300Bar bottle & they told me I had to install the first reg. Those liars lol 😂 thanks for the info 👍👍

Why would you need to buy more bottles. You just fill the 300 Bar bottle you own to 250. Am I missing something ? But yeah you’re correct to run a 300Bar system you do need to install the 1st regulator & manometer, but they do just simply screw in, it’s basically a 5 minute job. I recommend the...