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Heavy Recoil Buffer HK 91, G3, & PTR-91 Rifles

SKU: HKP-01067
Brand: USA

The HK Heavy Recoil Buffer For HK Style Firearms.

Made 100% in the USA by one of best HK gunsmiths in the business. Each unit is based on the original HK German 2 stage factory heavy buffer, rigorously tested & proven to be the very best & made from the very best in materials. This enhanced heavy buffer offers an improved design as even more buffering enhancements were made in the design and manufacture of this HK G3 heavy buffer. There is NO FINER buffer available than the HK heavy buffer. If you want the best buffer for HK or clone than this is it!


  • HK 91, G3, PTR
  • SAR-3/8, FMP, Vector, SR9, PTR PDW, V51, etc
  • Other HK custom builds and clones


Improved Buffer over the HK factory standard buffer & was designed for heavy semi or full auto use.

Reduces recoil felt by shooter.

Aids in faster follow up shots.

Reduces the wear and tear on internal parts and prolongs weapons longevity.

US Made Heavy Buffer has been touted as being even more effective than the HK factory German G3 heavy buffer, because of the fourth break spring and enhanced design features.

This is the highest quality buffer we have used encountered. HKParts highly endorses this upgrade to your HK rifle if you want an even sweeter shooting experience.

Shooters Tip:

To really reduce recoil & improve quicker follow up shots HKParts recommends:

  • Heavy Buffer
  • PWS Compensator
  • Heavy Rubber Buttpad
  • All three of these items are found listed below

For an even better shooting experience, this combination above will give you the best and most effective set available for your HK Rifle. Happy & safe shooting from HKPARTS!

Please note: Because the heavy buffer is larger in diameter (.90 inches in diameter) & longer than a standard G3/91 buffer. It is likely that your particular stock application will require fitting in order to use the heavy buffer in your A2 or other fixed stock (PRS, Etc). Neither these nor any of the standard buffers fit in the A3 style (retractable) stocks. The rear screw is optional as well and is not required or needed. Only the front hardware at the 6 & 12 o'clock positions are required for install.

Price: $199.95
In Stock
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Heavy Recoil Buffer HK 91, G3, & PTR-91 Rifles
Heavy Recoil Buffer HK 91, G3, & PTR-91 Rifles
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HK21E, HK23E Factory Heavy Buffer

HK21E, HK23E Factory Heavy Buffer

Price $249.95

Out of Stock

Product Reviews

Write your own review

"PTR-91 Rifle must have"

eowwarrior on 6/15/2011 10:09:52 PM

Overall Product Rating:

This buffer significantly reduces felt recoil. On the PTR-91 USA made A2 Butt stock, her is what you need to do ... 1) widen the metal end-cap about 1/16" larger. 2) widen the hole in the molded butt-stock slight in the top 1/3 of hole about for about 1" of depth. A dremmel with coarse grit sanding drum took only about ten minutes for both mods.

"Buy one!"

George Durm on 7/4/2018 2:55:01 PMVerified

Order Fulfillment:

Desired Compatibility:

PTR 32K 12.5 barrel

Product Quality:

Overall Product Rating:

Installed on a PTR 32K with a Tailhook Mod-2 brace and HKP-17263 Handguard (this handguard is amazing BTW.) The part took some simple fitting, but, man, the effort was rewarded. The gun is remarkably more controllable. The recoil on the gun wasn't very snappy to begin with. However, the long, Sloowww... action of the enormous BCG is obnoxious. This buffer made all the difference. I don't know that the gun is cycling faster, but it sure feels like it. The shifting weight of the BCG has been reduc... More details

"gotta have it, too"

Stephen S. on 2/14/2012 7:50:05 AM

Overall Product Rating:

Calms down the recoil remarkably! Combine this with the PWS compensator, and a better butt pad...and you've got one smooth rifle. Get on target faster after some "double taps", you'll see what I mean.

"Definite gotta have!!!"

William Doody on 7/25/2011 4:03:07 PMVerified

Overall Product Rating:

I couldn't wait to get to the range after getting this. Combined with the heavy butt pad, the difference was remarkable. I was double tapping nickel sized groups at 100 yards........well, maybe not that good. I was however, shooting at 50 yd indoor range and double tapping within the black of a 12" target with my Eotech. It was actually quite fun, and not much recoil felt through around 100 rounds. A Must have.

"Works Great"

Grover Brown on 7/31/2018 8:54:32 AM

Order Fulfillment:

Desired Compatibility:


Product Quality:

Overall Product Rating:

Opened up the end cap with a dremal tool. Fired 140 rounds with it. Works perfectly.

"PTR91 GI Heavy buffer"

Justin Triebel on 1/9/2013 11:39:33 AMVerified

Overall Product Rating:

Bottom Line if you want a G3 to recoil like a 556 AR this is the way to go, however this is not a simple bolt in install. I'm by no means a professional smith, but came up with way to install the buffer that was very secure. First remove stock, (mine was the slim green plastic HK), Remove the plastic but pad, clamp pad in BOLTED down Vise. Don't plan on reusing it because you'll destroy it trying to remove it. Once removed use 12" screw driver to remove stock buffer tube screw. Now remove the tw... More details

"Night and day difference!"

Rick Gargurevich on 3/14/2011 10:58:16 AM

Overall Product Rating:

Well worth the investment. I tried one of the urethane bumper-type buffers which was worse than the stock buffer. Adam recommended this one and there is a HUGE difference. Now there's a "gentle shove" instead of a sharp blow to my shoulder which makes follow-up shots way faster. I no longer have to put an ice pack on my shoulder after shooting! I had to enlarge the hole in the steel backing plate with a Dremel tool and remove the old buffer sleeve inside my stock to make it fit by carefully dril... More details

"ptr91 recoil buffer"

Leland Duffield on 2/3/2014 8:31:20 AMVerified

Overall Product Rating:

This buffer is A+. Best one I've see out of three other ones. Shipping, Company, and Buffer all A+++

"best upgrade for my ptr91"

MVP on 4/7/2013 11:02:17 PMVerified

Overall Product Rating:

My PTR91 A3 is so controllable with this buffer, 2 to 4 rapid shots on the target. I got the heavy rubber buttpad and PWS FSC91 Compensator and its shoots like a champ. The installation was quick, I used a dremmel tool to make the hole bigger on the back plate and my A2 stock. took like 7 minutes to do, i recommend this buffer to anyone who wants a softer recoil than a sharp blow to your shoulders. Thank you HK parts!!

"heavy buffer review"

David williams on 10/27/2009 12:56:16 PM

Overall Product Rating:

this buffer greatly reduces recoil. with the primary weapons muzzle brake i was able to let my 8yr old shot off the bipod,even with a weak shoulder mount he loved it. fitting was simple. Remove the inserted metal piece in the butstock and open up the outer plate a little with a drummel tool. very easy. "no-brainer"