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Questions & Answers
Does it just simply replace the original buffer, using the same spring?

Yes, it replaces the original buffer, however I’d recommend the orange .308 spring Sprinco part ID 25762 for a 9mm SMG carbine along with this hydraulic buffer

by Vern Snodgrass, Verified Owner, August 5, 2020
How does it work?

It works like a hydraulic shock in order to keep the bolt at end of travel in both directions... It can help prevent bolt-bounce on a 9mm AR SMG.

by Vern Snodgrass, Verified Owner, August 5, 2020
Customer Reviews
Helpful Positive Review
Nice and QUITE by TAZ, April 3, 2021
My son told me about the hydraulic buffer and how quite they are. They might cost a little more but I'm willing to pay more for a better piece of equipment. I'm very pleased with the results thanks to my son.
1/5 found this helpful
Helpful Positive Review
Almost no felt recoil by Lance, Verified Owner, October 21, 2022
On my AR 15 full length (16 inch barrel) PCC chambered in 9mm, I have been rocking this KynSHOT AR 9mm recoil buffer for about a year now and it is awesome. I have put about 1000 rounds down range rapidly and single shot increments, and it still feel...
Read More...
1/1 found this helpful
Helpful Positive Review
Tames back to battery thump by JZ, January 3, 2020
My FM-9 had an annoyingly harsh back to battery recoil that pulled the optics off target consistently. This buffer greatly improves the feel of the bolt coming forward, optic jump and generally smoothing out the entire recoil impulse. It is kind of e...
Read More...
6/6 found this helpful
Helpful Positive Review
Kynshot Ar hydraulic buffer by GaryZ003, October 15, 2020
This is an amazing product. I have these in all my Ar's. They truly work to soften the recoil and make your shooting experience alot smoother. I highly recommend this to everyone. Kynshot has an amazing and reliable buffer.
1/1 found this helpful
Most Recent Reviews
Cool PCC upgrade by Tristan, Verified Owner, March 19, 2026
Definitely makes the recoil less snappy and unpleasant on your PCC. Reduced bolt bounce
Most Recent Reviews
Is your PCC with it to you? by Augustus, Verified Owner, March 13, 2026
It really does work, It noticeably softens the recoil in my AR9, I have a Stern Defense upper with Faxon 9mm bcg. It's not a huge difference but it's noticeable. Now is it worth $160, the real question you should be asking, is your PCC your weapon o...
Read More...
Read All 15 Reviews
Color:
Silver
Finish:
Anodize
Gun Make:
AR Platform
Gun Model:
AR-15
Diameter:
0.76 in, 0.87 in
Length:
3.9 in
Weight:
6 oz
Condition:
New

Code: 3P7-RBF-FM17S-RB5007

MPN: RB5007

UPC: 854476005065

List: $164.99Save $5.00
$159.99
Purchase Restrictions Purchase Restrictions

made-in-usa-flag Made in USA

Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Blitzkrieg Components AR 9 mm Recoil Buffer

The Standard 9mm Hydraulic Buffer model has our normal amount of hydraulic resistance. This is the best choice for short barreled 9mm applications (7.5" barrel or less) but can be used for all PCC barrel lengths. This buffer has the standard amount of hydraulic resistance that we have historically used in our 9mm buffers. This is a great fit for a wide range of PCC guns. Can be used with our PCC buffer weight to add mass and further slow the action. This buffer is not recommended for use with lightened bolts or short stroke systems.image

Blitzkrieg Components partnered with KynSHOT to develop a top-of-the-line 9mm specific AR-15 buffer using KynShot's Hydraulic Buffer Technology. The Hydraulic Buffer body uses hydraulic shock absorption to dampen the impact of the bolt at the rear of its travel and also to dampen the forward impact of the Buffer's weight as it chambers the next round. It's weight and length have been optimized for the 9mm application so that it runs reliably, softens recoil, smooths out the action, and stops just behind the bolt catch using any 9mm Parabellum (9x19mm) ammo type. It provides the softest recoil impulse of any 9mm buffer we know of and will allow very fast follow up shots, improved accuracy and less wear on the firearm. Works in PCC builds with 3.5" - 16" barrels, either suppressed or unsuppressed and with all common 9mm loads. Normally the only difference is what buffer spring needs to be used. Our recommended barrel length for selecting this buffer is 7.5" or less. For barrels 8-16" we normally use the RB5015HD buffer, however we do have customers who like the feel of this buffer the best even with the 16" guns. The hydraulic fluid and seals are made to meet mil-spec requirements and have an ambient temperature operating range of -30F to +150F. This buffer has proven itself in the harsh arena of PCC competition and is the choice of many of the top ranked shooters in the world.

The blowback operation of the 9mm AR-15 drives a very heavy bolt much harder than a standard AR-15 BCG and it needs to be dampened as much as possible to optimize the system, reduce wear on the firearm and reduce recoil and sight movement. For this reason, the buffer is a very important component in getting a 9mm AR-15 to run at its full potential. The design is simple, yet very effective and will feel softer and run quieter than any conventional AR buffer. Spring noise is also dramatically reduced using this buffer. The length of our buffer stops the bolt just behind the bolt catch on a 9mm AR-15 without the need for a spacer in a collapsible stock buffer tube. If used in a fixed stock, we do sell a spacer separately for that application.

Spring Selection Guidance:

Buffer Spring selection is very important to optimal performance and minimal recoil and sight movement. There are a variety of factors that effect how hard your 9mm AR cycles and which buffer spring will be best. These include barrel length, suppressor use, ammunition energy, bullet weight, bolt weight, and hammer spring weight. We recommend running a pistol caliber AR with the strongest buffer spring that runs reliably and cycles fully in your weapon. This sometimes requires a bit of trial and error on the part of the shooter to find the sweet spot since every build is unique and even guns with the same build specs can run differently and require a different spring. With this buffer a .308 carbine spring is normally best for 8-16" barrels and a .308 rifle spring can be used if greater spring strength is desired. For barrel lengths of 7.5" or less an extra power .223 carbine spring is typically the best choice starting with the Sprinco Red spring and working down from there. If the Sprinco Red is still too strong for your gun, then the Sprinco Blue or JP .223 Carbine are the next step down in strength, after than is the Sprinco White (standard power) and Sprinco Yellow (reduced power) if you need something lighter in order to cycle correctly.

Using with our PCC buffer Weight:

Our PCC buffer weight can be used with this buffer to add more mass in front of the buffer. This often softens and smooths out the action even further. We have had very good feedback from our customers when they try the weight. It does not make the action feel sluggish at all. There is plenty of power and speed in the action even with the extra weight. It is still very fast.

Bolt Weight:

If your bolt has a weight in it, we recommend keeping the weight in the bolt. Removing the weight to get a lighter bolt is not recommended in blowback guns, even if using light competition loads.

Improvements:

Over the last several years our buffers have been run hard by thousands of shooters in just about every conceivable type of build and in intense PCC competition. We have had great feedback from our customers which has resulted in several rounds of product improvements to achieve maximum effectiveness and service life. Our goal is the most effective buffer and the most durable. The buffers we are now shipping have all the latest improvements.

WARNING: California`s Proposition 65

Specifications for Blitzkrieg Components AR 9 mm Recoil Buffer:

Manufacturer: Blitzkrieg Components
Color: Silver
Finish: Anodize
Fabric/Material: 17-4 Stainless Steel
Gun Make: AR Platform
Gun Model: AR-15
Diameter: 0.76 in, 0.87 in
Length: 3.9 in
Weight: 6 oz
Condition: New
Gas System Type: Blowback
Country of Origin: USA
Gun Type: Rifle

Features of Blitzkrieg Components AR 9 mm Recoil Buffer

  • Reduced Recoil: Hydraulic buffers significantly decrease felt recoil, improving shooting comfort and accuracy.
  • Enhanced Durability: Built with high-quality materials, these buffers ensure long-lasting performance and reliability.
  • Faster Follow-up Shots: By reducing recoil and improving cycling, shooters experience quicker and more precise follow-up shots.
  • Most recoil reduction of any 9mm Buffer made
  • Mil-Spec rated hydraulic fluid and seals can operate in ambient temp of -30F to +150F
  • Super Smooth Running
  • Faster follow up shots
  • Quiet Buffer Operation
  • Reduced Spring Noise
  • Compatible Design: Designed for compatibility with popular pistol caliber carbines, these buffers are versatile and easy to install.

Package Contents:

  • Blitzkrieg Components AR 9 mm Recoil Buffer

Blitzkrieg Components AR 9 mm Recoil Buffer Orderable Models

List of Orderable Models

  • Blitzkrieg Components 9mm Hydraulic Buffer Standard, 4in, Stainless Steel, RB5007 , MPN: RB5007 , UPC: 854476005065 , Code: 3P7-RBF-FM17S-RB5007

Blitzkrieg Components AR 9 mm Recoil Buffer Unavailable & Discontinued Models

List of Unorderable Models

  • USED KynSHOT AR 9 mm Recoil Buffer, Silver, RB5007, EDEMO6, Used, Condition Fair , MPN: RB5007-EDEMO6 , Code: 3P7-RBF-FM17S-RB5007-EDEMO6
  • USED KynSHOT AR 9 mm Recoil Buffer, Silver, RB5007, EDEMO5, Condition Fair, Other , MPN: RB5007-EDEMO5 , Code: 27P-RBF-FM17S-RB5007-EDEMO-OT-D
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