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Geissele's braided buffer spring is a solution looking for a problem.

The standard mil-spec spring has been working fine for over 60 years.......


I'm not a fan of "changing things for the cool factor even tho they work perfectly fine as-is".
 
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It's probably too heavy for a rifle length gas system. It probably works with the other H1 buffer because the spring is not as stiff or more broken in and is right on the edge of working vs not working.

Try a standard weight buffer for the rifle length system.

Also, what length is your buffer tube? Are you using a rifle length? Or standard 6 pos.
 
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Try weighing the weights. Found a comment on another forum they had some issues and some back and forth butting heads with geissele engineering then he realized they had put the wrong weights in, mixed up steel and tungsten in assembly. Lost the link already but try weighing and see if they screwed up the weights in assembly.

jiffx2781 said:
Don't know exactly what the problem is. According to the paper that came with it it's supposed to work on 18" spr barrels which should also have a rifle length gas port. That shouldn't be any different than my 19" with a rifle length gas port.

All I know is the rifle functioned with two other buffer systems but not the Geissele.

Hopefully someone chimes in who has experience with the Geissele system working or not working and can provide some input.

Either way I'm just going to get another JP SCS.

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I’ve only got experience with the super 42 in an 11.6 AR, but I do have to say that the twang in the buffer tube is noticeably rare in comparison to the standard spring. And with 3 tungsten weights, the rifle cycles flawlessly, ejects consistently, and the recoil is about as minimal as it could be. I’d buy it again, but of course you do need to tune the buffer to your rifle.
 
I’d say your solution is simple, if it works with other buffer/spring combos but not the G one, swap them.

I do agree though, the super duper 42 does absolutely nothing beneficial for a shooter. I bought one on a whim just to see what the hype was about, as I prefer to form my own opinions before assuming internet banter to be truthful and accurate. Then again, I don’t sit and meditate with my rifle in a field of green carefully observing and recording every noise I hear coming from it, too busy with putting rounds on target but that’s just me I guess.

Frankly, I never got the purpose of the 42 or the silent capture springs from the perspective of “taming buffer twang”. Just seemed like a gimmick, last I checked gunshots were a hell of a lot louder than a twangy spring and it doesn’t have any measureable effect on how the rifle shoots and functions.
 
I would assume the SPRs they are referring to also include mid length gas and the H1 is too heavy.
To me their wording suggests the SPRs are mid length gas.
"Works well in 18" SPRs, 16" rifles with mid-length or carbine gas systems"
Maybe try with a standard buffer?
 
I run an h2 with the geissele 42 in my rifle length gas slr. No issues so far i the near 1000 rounds I've managed to put through it.
 
Buffer spring lasts for ever, there is no reason to get a multi-stranded spring because you want a spring that lasts for ever to last longer that forever. just my 2 cents.

i have only see this sort of spring used in SG55X, because it needs that to resist the heat inside the gas tube. Regular sprig loses tempering by the amount of heat generated.

There is no heat inside an AR buffer tube.
 
When they're talking about 18" SPR barrel they're talking about a USN MK 12. That things got a rifle length gas tu but they also has a fixed stock with a rifle spring and buffer. I actually remember hearing they had some issues when they took the uppers off and putting them on their collapsible stock M4A1s. The C7A2 has a rifle tube and a carbine stock and I can definitely tell you that I noticed a significant difference in the recoil characteristic the first time I shot one. I'm pretty sure there's more money that went in the testing and development of that system than I could ever afford and all the ones I've had go through my hands had a regular spring with an H2 buffer.
 
Not sure what to say about OP issue. We haven't seen a H1 S42 that didn't run where a H1 carbine setup did. Softer spring on the non S42?

Re Toolcraft though. They are pretty much the gold standard of BCGs. It's all they do, and they do it well, and they've been doing it for years.
 
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