question about buffer spring strenght/buffer weight

J

JR Hartman

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Hey, so I was thinking, my 16" carbine length gas system AR-15 REALLY forcefully ejects the brass. I know, good thing, but is this wasting energy?

Could I put in a stronger spring, or heavier buffer, or combination of both?

Also, I think about a stronger spring because the ONLY failure I have ever had on this rifle was a failure to feed as the bolt parts got dirty and the recoil spring wasn't strong enough to power it back into battery.

Or, will this cause timing issues, or short stroke issues? Or?

I have also thought about an adjustable gas block, but, 1), I don't know much about this, and 2) I don't have any experience doing this sort of work.

thanks all! :)
 
JR Hartman said:
Hey, so I was thinking, my 16" carbine length gas system AR-15 REALLY forcefully ejects the brass. I know, good thing, but is this wasting energy?

Could I put in a stronger spring, or heavier buffer, or combination of both?

Also, I think about a stronger spring because the ONLY failure I have ever had on this rifle was a failure to feed as the bolt parts got dirty and the recoil spring wasn't strong enough to power it back into battery.

Or, will this cause timing issues, or short stroke issues? Or?

I have also thought about an adjustable gas block, but, 1), I don't know much about this, and 2) I don't have any experience doing this sort of work.

thanks all! :)
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Where do you think any recovered energy is going to do or what work is it going to achieve?

Very forceful ejection is an indication of over high bolt speed which is a result of over gasing. Two potential solutions for this. Either a heavier buffer or an adjustable gas block. Both are easy to install.

The first thing I would suggest is you learn to take your rifle apart and how it works. Replacing parts with no idea of how things work is just wild ass guessing and is likely to cause troubles.
 
If it's anything else than a Colt or LMT it's probably overgassed. What kind of buffer are you running right now? You should be able to drop an H2 in there without any problems. Also, lube it properly, i;e run it wet, the spring not powerful enough to get back into battery is a mystery to me. I'm not into fancy springs, if it doesn't run on a GI spring it's trash.

Don't get cought up into ejection patterns or anything like that. If it ejects reliably it's fine. Don't mess with it.
 
stock buffer, its a Windham. Zero other problems, great rifle, and its only happened once, and it was dirty. I am not really trying to fix that issue, that would just be a side effect.

I just suspect it was over gassed like said above. Waste of energy.
 
JR Hartman said:
stock buffer, its a Windham. Zero other problems, great rifle, and its only happened once, and it was dirty. I am not really trying to fix that issue, that would just be a side effect.

I just suspect it was over gassed like said above. Waste of energy.
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It's overgassed so you should buy an H or better an H2 buffer and call it a day. ;)
 
Well there aren't many places in Canada that carry those, I would only recommend you Colt and LMT, but they are out of stock everywhere I checked.
 
Dietz said:
Well there aren't many places in Canada that carry those, I would only recommend you Colt and LMT, but they are out of stock everywhere I checked.
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I would be very surprised if either colt or lmt produced their own buffers as opposed to buying from a generic distributor or manufacturer (likely offshore).
 
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