11-13-2023, 08:59 PM
(This post was last modified: 11-13-2023, 09:02 PM by Happy2Shoot.)
I use the Xtra-Heavy buffer 8.5oz from heavybuffers.com for a 8.5" 5.56 pistol that I shoot suppressed.
It is smooth, recoil is much improved, and double-taps at 25 yards on a 2 second rotating target are easy. It has an adjustable gas block, but that wasn't enough. I set the gas block to lock back the BCG on an empty mag with one extra click open for a margin of error when dirty or cold or both. With the standard buffer weight I was getting gassed out and my bolt speed was too fast. It would jam on average once per magazine. Usually the jam was a new round wedged in with the spent round in front of the chamber.
If your heavy buffer isn't "bottoming out" on the back of your buffer tube the the extra weight will help with felt recoil. The low mass buffer smacking the back end of the buffer tube is a big problem for felt recoil. Also, the low mass buffers fully compress the spring giving you full spring return at full speed. A high mass buffer may only compress the spring 75%. Given the same (or less) spring compression, a higher mass object will return slower than a lower mass object.
I use their 6.5oz buffer for my 12.5" 5.56 and 6.5 Grendel pistols.
It is smooth, recoil is much improved, and double-taps at 25 yards on a 2 second rotating target are easy. It has an adjustable gas block, but that wasn't enough. I set the gas block to lock back the BCG on an empty mag with one extra click open for a margin of error when dirty or cold or both. With the standard buffer weight I was getting gassed out and my bolt speed was too fast. It would jam on average once per magazine. Usually the jam was a new round wedged in with the spent round in front of the chamber.
If your heavy buffer isn't "bottoming out" on the back of your buffer tube the the extra weight will help with felt recoil. The low mass buffer smacking the back end of the buffer tube is a big problem for felt recoil. Also, the low mass buffers fully compress the spring giving you full spring return at full speed. A high mass buffer may only compress the spring 75%. Given the same (or less) spring compression, a higher mass object will return slower than a lower mass object.
I use their 6.5oz buffer for my 12.5" 5.56 and 6.5 Grendel pistols.