The FX Impact M4 parts drawings are out. Look what they for the valve rod O Ring. Although it says FPM 90, I think its a FKM 90 oring. Unless someone can confirm that FPM 90 exists.
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Tuning FX Impact Mk2/M3 - slower first shot - no reg creep - quasi-scientific analysis
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I understand that FKM, FPM and Viton are almost same.
I still understand that this may improve the things a bit but the real issue is the design flaw that persists.
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I’m having some good consistency with the peek spacer and FKM 90 oring. Better than what it was. I can’t make your modification using the MK1 nut and FX will never modify it, so I’m left with the spacer and Viton oring.
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It's sad that FX is not fixing this issue while they know it very well.
This makes me feel that FX also knows all other issues also like POI shift but commercially they feel that they shouldn't fix it as fixing it might need them redesigning a lot of things.
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O-ring 2.84x2.62 - FKM - FPM - Viton - 90 Shore A - Black - ORS37071 Online Shop - Worldwide shipping
Buy O-ring 2.84x2.62 FKM O-Rings - 90 Shore ABlack online. O-Ring-Stocks has high stock, low prices and worldwide shipping
www.o-ring-stocks.eu Upvote 0
Hi guys. Yes, I noticed that change as well from PUR90 to FKM/FPM/Viton 90. Do you think they saw this topic?
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They know almost every weakness but fix it when a lot of users complain, just like they have introduced better trigger in M4.
But still I believe that the front part with front screw is much better solution.
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bom dia. Li todo esse tópico e gostaria de saber se sua ideia da arruela peek mais os orings viton está funcionando perfeitamente. Como está seu primeiro tiro?
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Just saw this as to the change from PUR. This makes me think that the M4s with the 15 warmup shots actually got old plenums with PUR and the “good ones” that don’t have the issue as severely got the updated orings. Next time I have the gun apart I’ll try to confirm what I have in mine…
Edit: if anyone has one or two addition PEEK washers they would be willing to part with and sell me let me know! No lathe…
Edit: if anyone has one or two addition PEEK washers they would be willing to part with and sell me let me know! No lathe…
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LOL. What a joke, at least they could own it… I got mine where I want it to be meanwhile, but for that statement alone the two FX I own will be all FX I’ll ever own.Fredrik says there is no evidence of any of this.
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D
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Yep that black o ring is junk
Best thing I did was got rid of it..and got rid of the cold shot problem all together.
That's a thing of the past.
Best thing I did was got rid of it..and got rid of the cold shot problem all together.
That's a thing of the past.
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Hello, i follow this thread fully, because i have also lost off velocity (39 fps) with the first shot with my impact m3 .25 caliber specially used for rathunting. I have a huma reg in it at 110 bars with no creep! I schoot at 872 fps. Can i replace the pur oring for this one? O-ring 2.84x2.62 mm Viton (FKM) 80 Shore A or is this one the best? https://www.o-ring-stocks.eu/nl/o-r...8xdSA_kedZCUc75mV8FLyz0vvK-gokOBoCG8wQAvD_BwE
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I ordered from Mubhaur the special aluminum plenum part and ik must say it is working great. With the original part from FX ik had with the first shot a lost 88 fps. It took 6 till 8 shots to get the 871 fps. That was my tuning for .25 m3. Now the first shot is 865 fps en the second shot straight 871 fps. So i happy with with this special made part all the way off Pakistan!
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