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Blitzkrieg AR15 9mm Hydraulic Buffer - HD
Blitzkrieg 9mm Hydraulic Buffer HD
Blitzkrieg Components 9mm Hydraulic Buffer by KynShot

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Our Price: $139.95

Availability:: IN STOCK
Product Code: RB5015HD

Blitzkrieg Components / KynSHOT 9mm AR-15 Hydraulic Buffer - High Damped

Our Heavy Damped (HD) PCC Buffer Model has stiffer hydraulic dampening and stronger return spring for high stress applications. For Pistol Caliber Carbine builds that need increased shock absorption. Can be used in typical PCC carbine builds as well as short-stroke systems, and for hotter ammo. This HD model is not recommended for short barreled builds since they do not run the bolt as hard and will get more effect from the standard model. This buffer model was developed to fill the need for stiffer shock absorption which is needed on some PCC guns. If you plan to run your gun in a short stroke manner, then we recommend this buffer with our PCC buffer weight which will add mass while shortening the stroke. Many shooters feel that this buffer with the PCC buffer weight is the softest running even with a full stroke 16" carbine.

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. The hydraulic fluid and seals are made to meet mil-spec requirements and have an ambient temperature operating range of -30F to +150F.

The blowback operation of a PCC 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 AR-15 PCC 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.

Buffer Spring selection is very important to optimal performance and minimal recoil and sight movement. While the 5015HD buffer has increased resistance compared to the 5007 buffer, it will need similar spring strength to get optimal performance unless additional weight is added using our PCC buffer weight. If using the buffer weight, then spring strength can often be reduced. Trial and error is often needed.

Spring Selection Guidance:
*The following is provided as general guidance as a starting point in spring selection on 9mm carbines:
P 308 Rifle Spring - 14.5" & 16" barrel without PCC buffer weight
JP 308 Carbine Spring or SPRINCO Orange Spring - 14.5" & 16" barrel with PCC buffer weight

Using with 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 the action even further and can also allow you to step down one level in spring strength from a .308 rifle to a .308 carbine spring in a typical 16" carbine.

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 for blowback guns even with 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 in 2018 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
    Increased Hydraulic Resistance and Heavier Return Spring
    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: 8

  0 of 0 people found the following review helpful:
5 of 5 So good! July 8, 2020
Reviewer: Sascha Pendegraft from CA United States  
The recoil on these builds is already minimal, but this is next level smooth. I paired it with the .308 spring (per the advice) for my short barrel, and it is just perfect.

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  0 of 0 people found the following review helpful:
5 of 5 Hydraulic buffer in pcc9 build April 21, 2020
Reviewer: Jim Beck from Huntington Beach, CA United States  
I was building my first pcc9 and called Blitzkrieg by recommendation of a friend also using your products.
Brian was busy but, took the time to listen to my story and recommended his buffer and a .308 buffer spring to handle the recoil.
The gun ran flawlessly the first shot and every other of the 200 plus rounds ran for a test.  The recoil was non-existent, keeping the barrel flat for follow-up shots.
This is the answer for pcc builds !

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  0 of 0 people found the following review helpful:
5 of 5 Great February 13, 2020
Reviewer: GP from IL United States  
A must have for your competition PCC

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  2 of 2 people found the following review helpful:
5 of 5 Buffer testing for my 9mm PCC competition rifle. May 21, 2019
Reviewer: Mike Spear from Rogers, AR United States  
I use my JP GMR-15 rifle exclusively for USPSA competition and have spent over a year trying all kinds different buffer and spring combinations.  I always end up back with the Blitzkrieg buffer!  It is the very best at reducing red dot movement and now when some new wonder buffer comes out I save my money and know I have the best product available.  Salute to Brian and all the team at Blitzkrieg you guys are the best!  Thank you.

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  0 of 0 people found the following review helpful:
5 of 5 Excellent buffer for high PF ammo May 1, 2019
Reviewer: T. Owens from Glendale, AZ United States  
My new MBX barrel loves 147 gr. ammo.  I switched from the Standard hydro buffer to this heavy hydro buffer to accommodate the higher Power Factor (PF).  It works great.  Fast follow up shots with very low felt recoil.  The HD buffer with a JP 308 Rifle length spring is perfect for high PF rounds.

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