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Kaw Valley Precision Stainless Steel Heavy Tungsten Buffer
As Low As $99.95 Save Up to 11%
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Most Helpful Positive Review Works great for AR-9 builds
I purchased this buffer after a lot of research into building/tuning a 9mm AR-platform pistol/carbine. Since they operate on direct blowback, it is important to adjust your total reciprocating mass to reduce felt recoil, ensure proper cycling, prevent undue wear on the system, and (most importantly) delay blowback long enough for pressure in the system to drop to safe levels. As such, I was specifically looking for an extended (~4 inch) buffer with internal sliding weights, and the KVP-10oz meets both criteria. The specific buffer I received weighed in at 10.25 oz which, combined with my 14.4...
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Best thing i got for my AR9

by Aj, Verified Owner from SD, United States Written on July 19, 2026
I helped my AR9 from nose diving the rounds in to the feed cone
Would recommend: Yes
Was it helpful to you? Yes | No

great deal

by h, Verified Owner from TX, United States Written on July 18, 2026
Great buffer weight installed on my jawbone and going to try and use with my ar9p build see which one runs better with it
Would recommend: Yes
Was it helpful to you? Yes | No

Heavy buffer

by yennchi, Verified Owner from SC, United States Written on June 30, 2026
Works great in my blowback AR9, gun cycles just like it is suppose to. Feels and looks high quality. Weighed on kitchen scale and it weighed 10.1oz!
Would recommend: Yes
Was it helpful to you? Yes | No

Great product exactly what you’re looking for!!

by Jake, Verified Owner from VA, United States Written on June 26, 2026
If you’re getting this buffer for a special reason, they work perfect for it� iykyk�
Would recommend: Yes
Was it helpful to you? Yes | No

Kaw Valley Precision Stainless Steel Heavy Tungsten Buffer

by SKYNETUP, Verified Owner from UT, United States Written on June 24, 2026
It’s a must in 9MMPCC 10 ounce weight weight actually move inside. I think his name is blowback nine on YouTube has tons of knowledge he was saying you actually had to shave a little off the rubber part to make it an exact 4 inches so far I’ve done that to both of them and they’ve worked flawless, but I would definitely watch blowback nine he’s the man PCC extraordinaire
Pros:
  • Buffer weights inside move. And it 10oz
Cons:
  • The CON IS IT COST WAY TO MUCH
Best Used for:
  • 9mm PCC PISTOLS
Would recommend: Yes
Was it helpful to you? Yes | No

10oz buffer for ar9

by MICHAEL MENCHACA, Verified Owner from TX, United States Written on June 20, 2026
This worked out awesome for me. Great product. Got here fast.
Would recommend: Yes
Was it helpful to you? Yes | No

Great for PCCs

by FastEarle, Verified Owner from UT, United States Written on June 18, 2026
Nice and heavy, did the job I needed it to do. Will help with Billy bounce if it's an issue.
Pros:
  • well made
Cons:
  • None
Best Used for:
  • PCCs
Would recommend: Yes
Was it helpful to you? Yes | No

Perfect. Highly recommend for your 9mm build

by Isaac, Verified Owner from TX, United States Written on June 10, 2026
Made my 9 run perfect. I've seen where some trim the bumper pad a bit but mine ran fine with zero modifications. Clearance with LRBHO was exact. Using a standard flat wire spring.
Would recommend: Yes
Was it helpful to you? Yes | No

I hate to say it, but it’s the only one. 10oz. Kaw valley

by SKYNETUP, Verified Owner from UT, United States Written on June 6, 2026
I hate to say it, but it is the only one that worked. I’m in business. I would say ( (expensive )but it’s the only one that works. Springs are a big factor, but the buffer weigh is necessary. With the movable weights inside.
Pros:
  • Movable weights inside
Cons:
  • price
Best Used for:
  • 9mm PCC
  • 9mm PCC builds
Would recommend: Yes
Was it helpful to you? Yes | No

10oz buffer

by birddog, Verified Owner from VA, United States Written on May 26, 2026
This is a great buffer with moving weights inside. This should help my 9mm occ with bolt bounce and a solid lock up. Quality appears to be first rate with no noticeable flaws.
Would recommend: Yes
Was it helpful to you? Yes | No
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Last updated 2025-11-12 UTC.