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How do you know what type of buffer you need/want

This is a discussion on How do you know what type of buffer you need/want within the AR Talk forums, part of the Long Gun Talk category; So out of curiousity how do you know what type of buffer you have/need. I know M4 buffers are shorter correct? But beyond that I ...

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Old 02-20-2011, 02:00 PM   #1
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How do you know what type of buffer you need/want

So out of curiousity how do you know what type of buffer you have/need. I know M4 buffers are shorter correct? But beyond that I read on the army review of the m4 that certain buffer swap made it much more reliable. So umm if I am getting a used ar15 how do I know the type of buffer should be in there.

On top of that how do I know what type of buffer is ideal for 6.5 grendel? I have no idea.
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Old 02-20-2011, 02:52 PM   #2
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Buffers effect two things, primarily perceived recoil and then, ejection angle which changes with heavier buffers slowing down the process a bit.

Most are fine with the std. buffer supplied with their rifle. Others like to "tweek" a bit.

You might be interested in the back and forth here....................... http://smith-wessonforum.com/smith-w...al-buffer.html

As you can see, opinions vary as to need/desirablity of heavier buffers.
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Old 02-20-2011, 03:13 PM   #3
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You need a carbine buffer and spring for a collapsible stock and a rifle length buffer and spring for a rifle stock. Then you can play with the weights of the particular length buffers according to your barrel length. You might want a heavier or lighter buffer in that length for your rifle.

Here's some talk about 6.5 grendel buffers, I don't own one and know nothing about them.

http://www.xdtalk.com/forums/ar-talk...-out-here.html
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Old 02-20-2011, 05:32 PM   #4
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This chart shows the desired ejection patterns. You can play with your buffer weights / spring combo to achieve it.
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Old 02-21-2011, 11:40 PM   #5
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deadcenter, very nice chart. mine is perfect.
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Old 02-23-2011, 09:08 AM   #6
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Quote:
Originally Posted by Deadcenter View Post


This chart shows the desired ejection patterns. You can play with your buffer weights / spring combo to achieve it.
I've found that chart to be absurdly incorrect. The ejection pattern between 12 & 3 that shows a heavier buffer or M16 carrier recommended is exactly backwards. When I install an M16 carrier in any of my ARs, I get the 12-to-3 (mostly about 1:30) ejection pattern. Going back to the lighter AR carrier, which SPEEDS UP the action, makes for a more positive, correct ejection pattern. It's really simple h.s. physics. Whoever drew up that chart probably never took h.s. physics or failed, if they did.
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