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Posted: 7/7/2016 9:57:39 AM EDT
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Looking to run a H2 buffer with a 18" barrel with rifle length gas system. Any issues that may come about or known issues?
TIA |
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Quoted:
Are you fixing ejection issues? Should be fine but sometimes if you have weak ejection now increasing weight may cause a problem. No known issues, just switching stock systems from rifle to a carbine. Figured going from a 5.5 oz to 4.8 oz buffer could cause some havoc. |
| Just shooting from the hip here since there are other potential variables in the OP's scenario as laid out. Generally I would think an 18" barrel with a rifle gas system and a carbine extension would do fine or at least start out with a standard carbine buffer weight. An H2 seems like two complete steps away from what I'd expect to find here. My first "guess" is that the rifle would be overbuffered and therefore not cycle properly. Like I said, a general observation for a general scenario as laid out here. |
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Quoted:
Just shooting from the hip here since there are other potential variables in the OP's scenario as laid out. Generally I would think an 18" barrel with a rifle gas system and a carbine extension would do fine or at least start out with a standard carbine buffer weight. An H2 seems like two complete steps away from what I'd expect to find here. My first "guess" is that the rifle would be overbuffered and therefore not cycle properly. Like I said, a general observation for a general scenario as laid out here. As someone pointed out above, the buffer on a rifle is over 5 ounces. I thought it was 5.2. But he said 5.5. Maybe I'm getting the 9mm buffer confused. Or he is. Either way an h2 is much lighter. I'm not sure if the carbine spring is stiffer because it's shorter, but I really don't think you'd have a problem with the H2. In the A2 forum CD said the Military had come up with one called an H6 for when you put a carbine extension with a rifle upper. Which I guess they do every once in a while. I wouldn't hesitate to use an H3. I'm not sure I've ever seen an H6 though, and I'm not sure how much it weighs. I think the rifle gas system is the most forgiving and any of them would work. |
| You should be fine but if you are not you can always change weights in the buffer or even change spring tension. I change buffers on a rifle once no issue but I changed because I was a little overgassed and the brass was getting damaged on the deflector so it solved the issue I was trying to prevent. |
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Quoted:
No known issues, just switching stock systems from rifle to a carbine. Figured going from a 5.5 oz to 4.8 oz buffer could cause some havoc. Quoted:
Quoted:
Are you fixing ejection issues? Should be fine but sometimes if you have weak ejection now increasing weight may cause a problem. No known issues, just switching stock systems from rifle to a carbine. Figured going from a 5.5 oz to 4.8 oz buffer could cause some havoc. The carbine spring is stiffer than the rifle spring, which is why the standard CAR buffer is lighter than the rifle buffer. With a rifle length system on a barrel shorter than 20" you might get poor ejection with a heavy buffer because of reduced dwell time. I'd use a CAR or H1 buffer to start. |
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I've got a build using a carbine extension and spring/buffer behind an 18" Faxon barrel w/rifle-length gas system. Gas port size .093". FA bolt carrier. Kicks brass out at 3 o'clock almost all of the time (depending on the ammo). No problems to report so far....been shooting this rifle for over a year now. |
| I typically test various buffer weights and use the one that will reliably lock the bolt back on the last shot fired with the weakest ammo I personally shoot. While it may not be the case for everyone, I have enough AR's to justify having all the various weighted buffers at my disposal for testing and end up using the one that works best. |
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Quoted:
No known issues, just switching stock systems from rifle to a carbine. Figured going from a 5.5 oz to 4.8 oz buffer could cause some havoc. Quoted:
Quoted:
Are you fixing ejection issues? Should be fine but sometimes if you have weak ejection now increasing weight may cause a problem. No known issues, just switching stock systems from rifle to a carbine. Figured going from a 5.5 oz to 4.8 oz buffer could cause some havoc. You will be fine with a standard carbine buffer. What havoc would be created? |
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Quoted:
I typically test various buffer weights and use the one that will reliably lock the bolt back on the last shot fired with the weakest ammo I personally shoot. While it may not be the case for everyone, I have enough AR's to justify having all the various weighted buffers at my disposal for testing and end up using the one that works best. This is what we would recommend. |
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