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Questions & Answers
is this a dead blow buffer with sliding weights?

Yes it is and has been confirmed!

by Red, Verified Owner, May 9, 2025
Can this buffer be used for an AR10 build (308)?

https://www.opticsplanet.com/kaw-valley-precision-ar-10-car-ss-tungsten-buffer.html. here's the AR10 Buffer.. using a long buffer in an AR10 will create a short-stroke situation

by Tom, Verified Owner, August 8, 2025
Customer Reviews
Helpful Positive Review
Works great for AR-9 builds by Ryan Hidalgo, Verified Owner, January 17, 2022
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, preven...
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12/12 found this helpful
Helpful Positive Review
Works great by Lahey, Verified Owner, March 30, 2026
Used with a forced reset trigger on an AR9 platform and it worked great. About 500 rounds so far, no issues!!
1/1 found this helpful
Helpful Positive Review
10oz heavy buffer by Greg Monsour, Verified Owner, April 2, 2026
Just why my blow back 9mm needed for the frt trigger system. Runs great suppressed too
1/1 found this helpful
Helpful Positive Review
KVP Stainless Heavy Buffer 10oz for AR9 by Bullbear, Verified Owner, December 21, 2025
This 10oz buffer works great in a short barrel AR9 pistol. It’s a bit longer than the normal buffer to help cycling blowback 9mm platform to not over extend towards the end of buffer tube. Works great with a super safety. Make sure to use a stronger ...
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4/4 found this helpful
Helpful Positive Review
no more bolt bounce by CR, Verified Owner, December 8, 2024
I have a relatively light bolt in my 9mm pcc and this brought it up to the magic number of 24 ounces . It now runs like a top and eliminates bolt bounce so no chances for outbof battery case pops. Also on a side note for anyone wondering since it isn...
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4/4 found this helpful
Helpful Positive Review
4" heavy buffer by Brad, Verified Owner, December 29, 2025
There are 4 tungsten pucs inside which alone makes it a good deal, by swapping in steel pucs 1 by 1 you can adjust its weight down from 10.5 oz
1/1 found this helpful
Read All 43 Reviews
Color:
Stainless Steel
Gun Make:
AR Platform
Gun Model:
AR-15
Gas System Length:
Carbine Length
Length:
4.125 in
Weight:
10 oz
Condition:
New

Code: 4S3-RBF-LC28-KVP-10OZ

MPN: KVP-10oz

UPC: 752830307711

List: $109.95Save $10.00
$99.95

Product Info for Kaw Valley Precision Stainless Steel Heavy Tungsten Buffer

Pistol caliber carbines such as 9mm, .40 S&W, .45 ACP, and 10mm are a blast to shoot but can be tough on AR-15's internal components....Add a suppressor, and the increased back pressure can cause tremendous damage, without properly tuning ytheir blowback system. The KVP 10 oz tungsten blowback buffer helps tame the destructive forces in suppressed and standard blowback AR15's. Do yourself a favor and fine tune ytheir setup for the softest shooting PCC possible!image

Specifications for Kaw Valley Precision Stainless Steel Heavy Tungsten Buffer:

Manufacturer: Kaw Valley Precision
Color: Stainless Steel
Fabric/Material: Stainless Steel
Gun Make: AR Platform
Gun Model: AR-15
Gas System Length: Carbine Length
Length: 4.125 in
Weight: 10 oz
Condition: New
Projectile Caliber: .355 Caliber, .40 Caliber
Caliber: 9mm Luger, 10mm Auto

Features of Kaw Valley Precision Stainless Steel Heavy Tungsten Buffer

  • Increases AR-15's dwell time in blowback setups
  • Quiets action (better for suppression) - 10.3-10.5 oz actual weight (tungsten weights can vary slightly) - 4 1/8 OAL (Buffer spacer is NOT required)
  • Increases Reciprocating mass and weapon reliability
  • Reduces wear on critical internal parts
  • Reduces felt recoil
  • Designed only for Carbine Length Stock and pistol kits

Package Contents:

  • Kaw Valley Precision Stainless Steel Heavy Tungsten Buffer

Kaw Valley Precision Stainless Steel Heavy Tungsten Buffer Orderable Models

List of Orderable Models

  • Kaw Valley Precision Stainless Steel Heavy Tungsten Buffer, 10 oz, Small, KVP-10oz , MPN: KVP-10oz , UPC: 752830307711 , Code: 4S3-RBF-LC28-KVP-10OZ

Kaw Valley Precision Stainless Steel Heavy Tungsten Buffer Unavailable & Discontinued Models

List of Unorderable Models

  • USED, Kaw Valley Precision Stainless Steel Heavy Tungsten Buffer, 10 oz, Small, KVP-10oz , MPN: KVP-10oz-EDEMO , Code: 4S3-RBF-LC28-KVP-10OZ-EDEMO-DF-D
  • USED Kaw Valley Precision Stainless Steel Heavy Tungsten Buffer, 10 oz, Small, KVP-10oz, EDEMO5, Used, Condition Like New , MPN: KVP-10oz-EDEMO5 , Code: 4S3-RBF-LC28-KVP-10OZ-EDEMO5
  • USED Kaw Valley Precision Stainless Steel Heavy Tungsten Buffer, 10 oz, Small, KVP-10oz, EDEMO6, Used, Condition Fair , MPN: KVP-10oz-EDEMO6 , Code: 4S3-RBF-LC28-KVP-10OZ-EDEMO6
  • USED Kaw Valley Precision Stainless Steel Heavy Tungsten Buffer, 10 oz, Small, KVP-10oz, EDEMO7, Used, Condition Like New, Inspect and Rebox , MPN: KVP-10oz-EDEMO7 , Code: 4S3-RBF-LC28-KVP-10OZ-EDEMO-RE-A
  • USED, Kaw Valley Precision Stainless Steel Heavy Tungsten Buffer, 10 oz, Small, KVP-10oz , MPN: KVP-10oz-EDEMO , Code: 4S3-RBF-LC28-KVP-10OZ-EDEMO-RE-B
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