Umarex New User with New Hammer

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Trondyne

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Mar 19, 2025
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Hey all,

Long time Airgunner but new here... I just got a new Umarex Hammer and found that the bottle appears loose... It turns and wiggles... Wondering if I should simply try to tighten this or if this could be a blessing since the bottle might easily be removed and upgraded...

Anyone have any experience with this kind of issue?

Thanks,

Jim
 
Hey I have the same question. My wife accidentally knocked my Hammer over when it was on its bipod. Now the barrel shroud is loose and the tank too. I'm not dumb enough to try to shoot it like that, and need to know if it's safe. Also will jb weld work on the shroud to secure it so it doesn't blow up on me. It's out of warranty so sending it back isn't really an option
 
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fritzoskinnick said:
Hey I have the same question. My wife accidentally knocked my Hammer over when it was on its bipod. Now the barrel shroud is loose and the tank too. I'm not dumb enough to try to shoot it like that, and need to know if it's safe. Also will jb weld work on the shroud to secure it so it doesn't blow up on me. It's out of warranty so sending it back isn't really an option
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Not familiar with the Hammer but I would strongly suggest NOT using JB Weld for the shroud problem! I'm sure there are other more correct & appropriate ways to fix that. Reach out here on the forum for help.
 
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fritzoskinnick said:
Hey I have the same question. My wife accidentally knocked my Hammer over when it was on its bipod. Now the barrel shroud is loose and the tank too. I'm not dumb enough to try to shoot it like that, and need to know if it's safe. Also will jb weld work on the shroud to secure it so it doesn't blow up on me. It's out of warranty so sending it back isn't really an option
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Sounds like something broke... Since it's out of warranty it wouldn't hurt to take the plastic grip off and inspect the gun to see what let go... then proceed with caution... Otherwise there are options but nothing I would post here... For $1000.00 these guns should be made to a higher standard.
 
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Sleestak said:
Fill it and find out. It is plausible that under pressure the bottle will align.

As long as it doesn't leak they are probably correct.
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Even if that was true, the lack of any corroboration from the Web as well as common sense and physics has to make one wonder if allowing 4500 psi to "seat" a wobbly bottle actually isn't insane... There is no precedent in any other example of any gun ever that I know of. These things are supposed to be precision instruments, not wobbly and loose... Also, this could work and still be obfuscating some other problem relying on pressure instead of a correct tight seal... I have been playing with airguns for well over 20 years and it sounds nuts to me...

Also the wobble appears to start where the regulator connects to the gun and so the entire assembly wobbles along with the grip.
 
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DeanB said:
Why dont you just try lightly snugging it up, cant anyone do that but you. Its the only way you know if it will work doubt if it will hurt as long as you dont crank on it.
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Yes, of course..but in the meantime it made sense to attempt to find out what's going on... Also, I don't know if I have the tool needed to remove the foregrip... I am also not happy about having to fix a new gun... these things look like they were assembled by children...
 
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Trondyne said:
Even if that was true, the lack of any corroboration from the Web as well as common sense and physics has to make one wonder if allowing 4500 psi to "seat" a wobbly bottle actually isn't insane... There is no precedent in any other example of any gun ever that I know of. These things are supposed to be precision instruments, not wobbly and loose... Also, this could work and still be obfuscating some other problem relying on pressure instead of a correct tight seal... I have been playing with airguns for well over 20 years and it sounds nuts to me...

Also the wobble appears to start where the regulator connects to the gun and so the entire assembly wobbles along with the grip.
Click to expand...
The 3 techs seem OK w it. If their word isn't good enough why ask here?

Umarex is more of a "return gun for repair" kind of mfr, so if they didn't advise returning it they must be comfortable instructing you to go ahead and fill.

What's going to happen if you do fill it? It'll probably either leak...or not.
 
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If there is a fill fitting that aligns with a cut out in the bottle guard/frame ?
yes the bottle will wobble until such time as it gets pressure that will stretch the connection to Reg a tad and bottle will no longer loosely wiggle, tho will move if pushed side to side.

For screw on Ninja type reg set ups this is typical
 
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Sleestak said:
The 3 techs seem OK w it. If their word isn't good enough why ask here?

Umarex is more of a "return gun for repair" kind of mfr, so if they didn't advise returning it they must be comfortable instructing you to go ahead and fill.

What's going to happen if you do fill it? It'll probably either leak...or not.
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What does "their word" have to do with asking here? Or anywhere else for that matter? And why wouldn't I ask anyone or anywhere someone might know? In a rush to submit to authority? Not me nor my $1000 Sir. There is no example of this kind of wiggle as normal in the entire industry.. If something sounds stupid I'd rather know WTF is going on before happily joining that club.
 
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Trondyne said:
What does "their word" have to do with asking here? Or anywhere else for that matter? And why wouldn't I ask anyone or anywhere someone might know? In a rush to submit to authority? Not me nor my $1000 Sir. There is no example of this kind of wiggle as normal in the entire industry.. If something sounds stupid I'd rather know WTF is going on before happily joining that club.
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Personally I would refer to the people who actually support the product before turning to the web for technical advice..but 2 or 3 forum members have corroborated what the folks at Umarex have already stated.

Are you still uncomfortable with what they have told you?
 
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Motorhead said:
If there is a fill fitting that aligns with a cut out in the bottle guard/frame ?
yes the bottle will wobble until such time as it gets pressure that will stretch the connection to Reg a tad and bottle will no longer loosely wiggle, tho will move if pushed side to side.

For screw on Ninja type reg set ups this is typical
Click to expand...
This is 100% correct information. You tighten the bottle all the way in and then only back it off far enough to align the fill nipple and gauge. It locks in place with pressure. The Gauntlet works on the same principle.
 
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Trondyne said:
What does "their word" have to do with asking here? Or anywhere else for that matter? And why wouldn't I ask anyone or anywhere someone might know? In a rush to submit to authority? Not me nor my $1000 Sir. There is no example of this kind of wiggle as normal in the entire industry.. If something sounds stupid I'd rather know WTF is going on before happily joining that club.
Click to expand...
I was the designer of the Gauntlet .30 for umarex and also designed the SL for them. I designed some of the upgrades for the Hammer since it's first release. What they told you is 100% correct.
 
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fritzoskinnick said:
Hey I have the same question. My wife accidentally knocked my Hammer over when it was on its bipod. Now the barrel shroud is loose and the tank too. I'm not dumb enough to try to shoot it like that, and need to know if it's safe. Also will jb weld work on the shroud to secure it so it doesn't blow up on me. It's out of warranty so sending it back isn't really an option
Click to expand...
Are you saying the bottle is loose under pressure or only when empty. I should have the parts to fix the shroud or possibly just walk you through the assembly process to make sure all is in order. There is a special bleed screw to degass since the plenum is so large.
 
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Trondyne said:
Even if that was true, the lack of any corroboration from the Web as well as common sense and physics has to make one wonder if allowing 4500 psi to "seat" a wobbly bottle actually isn't insane... There is no precedent in any other example of any gun ever that I know of. These things are supposed to be precision instruments, not wobbly and loose... Also, this could work and still be obfuscating some other problem relying on pressure instead of a correct tight seal... I have been playing with airguns for well over 20 years and it sounds nuts to me...

Also the wobble appears to start where the regulator connects to the gun and so the entire assembly wobbles along with the grip.
Click to expand...
It sounds like you needed well over 21 years. I have been playing with them, the good ones, for over 40years, and I started with pcps 35 years ago, and since I have been on the internet I have seen and heard about the loose bottle until filled plenty, especially since the Gauntlet first came ourt around 2018. You might think it's insane but it has been working great for me since introduced. There are plenty of bottle guns that don't employ this method, sells yours and get one of them, because you are probably never going to trust it at this point, even if the gun's designer has already told you it's fine.
 
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PumaCarl said:
It sounds like you needed well over 21 years. I have been playing with them, the good ones, for over 40years, and I started with pcps 35 years ago, and since I have been on the internet I have seen and heard about the loose bottle until filled plenty, especially since the Gauntlet first came ourt around 2018. You might think it's insane but it has been working great for me since introduced. There are plenty of bottle guns that don't employ this method, sells yours and get one of them, because you are probably never going to trust it at this point, even if the gun's designer has already told you it's fine.
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Not to beat up on the OP, but getting a consistant answer from 3 sources says something very positive about their CS. Even getting an answer at all from some AG purveyors seems to be a struggle

I don't have any personal Umarex stories, but also don't recall any negative buzz on the forums, so they seem to stand behind their products.

Any yes, they are plastic. But so are a lot of other air guns at that price-point, so wouldn't be too dismissive of the brand in that regard as well.

PCPs are definately flakey compared to PBs. My Evanix bottles spook me every time I fill them...also, I don't need to take a tool box w me when I combust. Yet here I am.
 
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Sleestak said:
Not to beat up on the OP, but getting a consistant answer from 3 sources says something very positive about their CS. Even getting an answer at all from some AG purveyors seems to be a struggle

I don't have any personal Umarex stories, but also don't recall any negative buzz on the forums, so they seem to stand behind their products.

Any yes, they are plastic. But so are a lot of other air guns at that price-point, so wouldn't be too dismissive of the brand in that regard as well.

PCPs are definately flakey compared to PBs. My Evanix bottles spook me every time I fill them...also, I don't need to take a tool box w me when I combust. Yet here I am.
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To come boasting about years of experience and yet never hearing about something as ubiquitous as all the project guns utilizing bottles with regulators with fill nipples on them where you had to turn them to line up, come on, you'd have to have been living under a rock, or simply never cared to read about "them" ergo not that much experience huh? Not wasting any more time with this.
 
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