AR15 Buffer?

[FALFire]

You keep your buffer tube when you use the ACE stock, they only provide you with a foam cover for your stock buffer tube. I have two of them set up that way.

 

[knockemdown]

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[Dave Zwiener]

Superior Shooting has a buffer spring that will last forever and does quiet it down a little. X-Ring products has them. They are developed by David Tubb.
http://www.xringproducts.com/SS-CSBufferSpring.asp