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Blitzkrieg AR-15 9mm Hydraulic Buffer - Standard
Blitzkrieg 9mm Hydraulic Buffer - Standard
Blitzkrieg Components 9mm Hydraulic Buffer by KynShot

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Our Price: $129.95

Availability:: IN STOCK
Product Code: RB5007

Blitzkrieg Components / KynSHOT 9mm AR-15 Hydraulic Buffer - Standard

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.

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.

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.


Length: 3.90" (when compressed)
Weight: 6.0 ounces
Mil-Spec Hydraulic Fluids and Seals - Ambient operating temp certified for -30F - +150F


ITAR Product - export of this product is strictly prohibited without a valid export license issued by the U.S. Department of State, in accordance with International Traffic in Arms Regulations (ITAR). Purchase of this product is restricted to U.S. Persons who do not intend to export this product or businesses with a valid export license operating in compliance with all applicable ITAR regulations.
  • Machined 17-4 Stainless Steel Buffer Body
    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

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 9

  0 of 0 people found the following review helpful:
4 of 5 Overall it was good... March 30, 2021
Reviewer: Andrew Crewe from ENGLEWOOD, OH United States  
A lot of research went into my Spikes/Gibbz side charging AR9 build. I first went with Spikes stainless carbine spring and KVP 7.5oz bolt. No FTF's in 300 rounds. (Glock mags)

My buddy and  I went to his range and we each put 30 rounds (groups of 10) through my gun to get familiar with the recoil impulse as it was. After that I changed to the Blitzkrieg buffer and we both shot another 30 rounds. I would say the difference was almost imperceptible, and he felt that it might have been a slight bit smoother but with a bit more muzzle flip.  The one positive was that the LRBHO worked every time while before we both had one occurrence where it didn't hold.

So overall, a small improvement over what I already had, but what I had was working satisfactorily. I'd say that I enjoyed my purchase experience and the product looks great, but hard to do backflips on the cost to benefit. I like knowing that it's in there and that I'm not likely missing out on anything.

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  0 of 0 people found the following review helpful:
5 of 5 Standard Issue September 17, 2020
Reviewer: Retired Squid from Hurricane, UT United States  
I use the hydro buffer as the standard buffer for my pcc builds. I use it with a 10.5" barrel and subsonic 147g 9mm. The buffer improved reliability when used with the 308 buffer spring. Felt recoil is less but if you're worried about 9mm felt recoil get on your face and start pushing.

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  0 of 0 people found the following review helpful:
5 of 5 Recoil Reduction March 13, 2020
Reviewer: Anonymous Person from Blanch, NC United States  
Built a PSA 4 inch 9mm AR pistol, SBA3 brace and sat it all in a Spikes Tactical lower with LRBHB.  Initially used the carbine spring and buffer supplied with the PSA upper and it beat the bejeezers out of me and slammed the bolt on every trigger pull. Thought about going with an H2 or H3 buffer with extra power buffer spring but decided after some research on your hydraulic buffer to give it a try. Sooo glad I did. Very soft to little recoil, no muzzle flip, and no problem with controlled pairs of follow up shots. Liked it so much i ordered one for my 10.3 inch 5.56 AR pistol and experienced the same results. I used the Blue spring with the 5.56  buffer and the Red spring with the 9mm buffer.

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  1 of 1 people found the following review helpful:
5 of 5 Amazing Product September 17, 2019
Reviewer: Brian Malek from Climax, NC United States  
Absolutely amazing, I can not recomend this product enough, if you are on the fence like i was just go ahead and purchase it, I slapped it in my PSA 4" Shockwave with their Blue spring and the pistol fires with less kick than my ZK1022, Absolutely amazing product i wish i could give it more stars.

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  2 of 2 people found the following review helpful:
5 of 5 Superior buffer system. May 21, 2019
Reviewer: David K from Maryland  
Just shot the Blitzkrieg 9mm hydraulic buffer for the first time.

I started out with my old setup so I had something fresh in my memory to compare to (carbine spring and 8 ounce KAK buffer, and then threw in the Blitzkrieg after a mag or two. Ended up swapping back and forth again later, just to compare the feeling again.

It’s night and day.

The hydraulic buffer is excellent at dampening felt recoil and muzzle flip. My follow up shots were much faster, and overall, the cycling of the action just felt smoother and more streamlined straight back into my shoulder.

Blitzkrieg was very helpful answering some questions I had prior to purchasing. Responding to my emails within 24 hours. And they even waived my shipping. Really nice guys.

I can, without a doubt, highly recommend this system. I can’t wait to shoot it more!

I was shooting mostly 124gr out of my home built AR-9 pistol with a 5.5 inch barrel, law tactical folder, SBA3 brace and Endomags.

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