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Posted: 5/14/2013 5:13:29 PM EDT
I just got a H3 buffer for a 9mm build. The thing rattles. Is this normal?
I am thinking of jamming lead in there to get rid of the rattle. Either that or silicon .
Link Posted: 5/14/2013 5:26:44 PM EDT
[Last Edit: 5/14/2013 5:27:18 PM EDT by shadowcop]
H3 has weights. Yes it will rattle.
If you don't like it, I will trade you a 9mm buffer for it.
No rattle.
Dave N
Link Posted: 5/14/2013 5:58:43 PM EDT
Originally Posted By shadowcop:
H3 has weights. Yes it will rattle.
If you don't like it, I will trade you a 9mm buffer for it.
No rattle.
Dave N


Thanks for the offer. I will just go with the H3 and if I can here the rattle shooting with a can I may take you up on it.
May be a while since I can not find a 9mm bolt.

Link Posted: 5/14/2013 7:07:07 PM EDT
In my own industries' jargon - "that's not a bug, it's a feature."

The rattle is there on purpose - the weights freely slide forwards and backwards a small amount. During cycling, as the bolt finishes moving forward and strikes the barrel, it will have a tendency to want to bounce backwards off the barrel momentarily (physics being what it is and all). During full auto fire (or rapid semi-auto fire), this bouncing can cause stoppages if it overcomes the force of the recoil spring. The sliding weights help to counteract this - about the time the bolt hits the barrel and begins to rebound, the sliding weights will reach the forward-most point in their travel inside the buffer, slamming into the front portion of the buffer. That in turn causes the buffer to transfer a little extra "oomph" forward into the bolt, usually nullifying the bounce-back.

Hope that helps,

-bob
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