How has the m4 single reg been working out for folks? Is it as consistent as the m3, given the higher pressure differential? Anyone adding a front reg back in?
Matt
Matt
FX M4 1st reg add?
- Thread starter Mlydon
- Start date
I doubt anyone wants the second reg back. Just another potential future problem and the amp reg is not a fun reg to work on at all. The only slight benefit of the 2 reg system was if you were shooting a super low operating reg pressure. Like 90-100 bar. That extra step down in theory took some of the load away from the secondary reg. In hindsight I think it was a little gimmicky. I admit I bought into it. There are a lot of companies that use one regulator to step down 300 bar. I don’t think the dual regulator is necessary. I certainly probably wouldn’t buy another fx gun with 2 regs.
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Don’t go backward, it’s not needed. I was looking for a easy way to remove the 1st on my Maverick, but it’s not as simple, like on the M3. Look up the M3 delete and you’ll see the 1st reg did not make it more consistent.
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The new brass piston amp can handle it, iirc thr delrin piston one started to give up at 170 bar. I put huma stuff in my m3 and it does well now even when I was way up at high pressure. When you get reg creep maybe look into putting a huma on as a first reg, but if it's working it works. Fx only survives on our appetite for replacing all the parts that work fine.
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I have three M3 dual reggers and also had two MKll dual reggers. None of them set below 140b on the second reg. There is a reason I do this. Never a problem or issue that would make me hate the first reg. But yes, I’ve had a first reg leak a time or two. If you truly don’t know why two regs are nice, don’t worry about it. But I will give you a clue, everyone’s take on why the need for two regs is partially wrong. There is another reason that makes me keep them. And yes, if I ever get drunk enough to order a M4, a reg and gauge will be on the shipping invoice.
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The only excuse I have for 2 regs is my survival mantra. 2 is 1 and 1 is none
. I don't know if it's super necessary outside extreme tight tolerance paper shooting? Last edited:
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I'm going to bet if its not down-range results it's pressure rating of 1 or all components in the reciever(at the time) between the bottle and the final reg, up until this revision. Perhaps not even for safety but more for warranty cya? Which is what I think the power block was (safety/pressure rating sold as performance).
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Nope. You have to fully understand how a pcp works. How bottle pressure affects everything no matter what. Or almost no matter what. I’ll leave you with that on this Christmas Eve. And seriously, all you guys have a Merry Christmas.
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Well it's fluid dynamics, this isn't super secret. You can just drop your theory so it's easily searchable and ends repeated questions. It does many beneficial things all at once but it depends on what you're being a little cagey about. It helps mitigate what my marauder suffered from, it's why a bottle made my garbage aea work better, it's a bandaid for manufacturing and engineering issues, and it presents a more constant chamber pressure to the gun which has its own positive cascade I think. The "water hammer" solving is probably my favorite. Id like to hear your take on it, genuinely.
Edit, a merry Christmas to you as well. I don't want this post to come off agressive, as it wasn't supposed to.
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Well M4 guys insist that it isn’t necessary. So did they engineer something new with this gun? No. It’s still just a normal PCP doing what PCP’s do. And I can’t be provoked into dropping anything.
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The other poster has me thinking here. There's a few changes that might act in harmony. I know from experience that the amp regs with delrin pistons can be sensitive to damage and quickly start creeping. Maybe the new brass piston regulator is stout enough to do the work that 2 preciously had to do. If my idea about action pressure rating changes and porting changes is in any way true, perhaps that made a first reg obsolete?
I really don't know, but I'd like to.
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Read post #35 in this topic.
Post in thread 'Fx impact m4, why did they got rid of 1st reg?'
https://www.airgunnation.com/thread...-they-got-rid-of-1st-reg.1317553/post-1796540
Post in thread 'Fx impact m4, why did they got rid of 1st reg?'
https://www.airgunnation.com/thread...-they-got-rid-of-1st-reg.1317553/post-1796540
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I'd tend to agree. After creep issues on both my delrin amp regs on the m3 I put huma stuff in there and it's flawless now.
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I do not know your reason for liking the two regulators but I know why I love them.
0.2094" is 1 MOA at 20 yards and I wanted to to shoot a 0.1XX" edge to edge 5 pellet group with my .177 M3.
Now I have shot a 0.212" 5 pellet group E to E at 10 meters with my Soviet Made IZH Baikal-46 pistol off a front rest using 7.0 grain MEISTERKLUGEN pistol diabolos at 420 fps.
So I figured the M3 could not throw a wad cutter diabolo slow enough at 10 meters to keep the pellet from walking on the paper and opening the hole due to the high spin rate but at 20 yards I may have a chance.
I tested 10 different diabolos by weight and size and found the domed H&N 9.57, 4.51 mm Baracuda FT would do the job with the smallest group at 11.8 to 12.0 FPE and the M3 tuned as follows:
Air valve at 2.5
Macro at 1.0
Micro at 2.0
First Reg at 120 bar
Second Reg at 70 bar
Course of Fire was sitting at the bench using an attached bipod and my right shoulder (no rear rest) with my left hand controlling the POA from the butt.
On January 31, 2024, the stars aligned, the planets aligned, the galaxies aligned and I shot my smallest 5 pellet group yet of 0.191" E to E at 20 yards measured.
I can take all 5 shots and the regulator gauges do NOT move.
I don't think I could get the gun that de-tuned and passive with just one regulator.
My goal now is 0.18X" EtoE so I am going to aquire a true sub 12 FPE Impact from FX.
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I’ll stand by its 110% completely unnecessary having used both. Companies in about any niche or hobby come up with new technological advances regularly. We as consumers believe and buy into just about all of them. Ones that prove themselves worthy stick around the ones that don’t fade and change into what was before or something entirely different.
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