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Spuhr Stock Assembly for G3,MP5,HK33/53
$373.99 $330.00 Save 12%
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Most Helpful Positive Review Transformed my PTR Rifle
I searched and reviewed every M-4 style adapter for the HK G-3 / PTR 91 rifle as I was desperate to find a way to shorten the length of pull on my PTR 91FR. My conclusion was that in the fully closed position the M-4 style adapters do shorten the LOP, but not my much, and in any other position other than fully closed it appears the LOP is right back where you started. I then discovered the Spuhr Stock Assembly which is specifically engineered for the HK G3 / PTR 91 platform and determined that the LOP with the Spuhr Stock is substantially shorter than one could achieve with the M-4 style adapt...
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Quality but overpriced.

by Volt, Verified Owner from IN, United States Written on July 2, 2026
If you are like me and watched an episode of Forgotten Weapons with Ian and believed every word that he said about this product, DONT! This stock is durable, looks cool and can really add a touch of modernization to your G3 clone, however do no be fooled. This stock will not reduce recoil. Its not designed to. Allow me to actually enlighten you. You can buy any third part AR15 buffer conversion for alot cheaper. The so called "In-line stock" is more of a gimmick as the stock itself is position exactly as it should be along may other AR15 conversion stock for the G3. It has to because the buffer system has to line up perfectly with the bolt carrier. I will add, that many of the already existing after market stocks are half as cheap with the same quality and moreover, if you really need to reduce the recoil to your shoulder you'll have to buy an after market buffer. Most buffers can be installed in most G3 clones and will significantly reduce that recoil that you feel.
What sets it apart is its unique style and ties to the Swedish AK 4D. The stock itself comes in a simple white cardboard box which includes some sort of buffer adapter. I didnt need it for the particular buffer that I have. The entire thing can be install relatively easy without much mechanical knowledge. It took me about 10 minutes to do it on my own after watching a tutorial on youtube (I suggest you do the same). It has shortened the length of pull dramatically for me which incredibly enough has made my G...
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Pros:
  • Easy to install
  • Adjustable stock
  • Reduces Length of Pull
  • Military Copy of the AK4D stock
Cons:
  • Expensive
  • The stock itself may not provide enough surface area for a solid shoulder hold
Best Used for:
  • People who want to modernize their rifle
Would recommend: No
1 of 1 found the following review helpful.
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Spuhr Buttstock

by gunr, from OR, United States Written on July 13, 2025
Good fitment and quality. Overpriced for what you recieve. Sharp sprue from plastic molding process.
Pros:
  • Fit
  • Function
Cons:
  • price
  • Finish
Best Used for:
  • AK4D
Would recommend: Yes
Was it helpful to you? Yes | No

HK revival

by Geves, Verified Owner from FL, United States Written on May 29, 2025
I purchased the Spuhr stock to update my 1950s HKG3 designed rifle. It is a vast improvement to the original design, however, it renders the original rear sight unusable. It is perfect if you are using optics. It is better than the original G3 and HK collapsible stock. Easy to install, just need to use your original buffer assembly and back plate from any G3 stock assembly. I am very happy with this well designed stock.
Pros:
  • Very well designed and built
  • Very well designed
Cons:
  • Renders OEM rear sight unusable
Best Used for:
  • Scoped HK 91
Would recommend: Yes
1 of 1 found the following review helpful.
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PTR 32 Upgrade

by HHH, Verified Owner from NV, United States Written on March 1, 2025
I originally had the all steel telescoping stock on my 7.62x39 PTR but it proved to have an exceedingly long LOP. Not to mention the increased weight. The Spuhr stock upgrade does need to be installed onto a separate buffer if your setup is in my original configuration. RTG Parts has what you need for the cheapest prices and very high quality OEM parts. My rifle now is substantially lighter with a much preferred compressed firing position.
Pros:
  • Seamless high quality upgrade with that legit HK appearance.
Cons:
  • Price.
Would recommend: Yes
Was it helpful to you? Yes | No

G3 spur stock

by hans, Verified Owner from NC, United States Written on December 19, 2024
Very good product amazing materials from a trusted company. I believe this is Swiss or German would definitely recommend it.
Would recommend: Yes
Was it helpful to you? Yes | No

Great Quality and Design

by David, Verified Owner from CA, United States Written on December 14, 2024
Exactly what I needed for my PTR91. Ergos are on point. A must have if you want to run optics on a HK91/G3 rifle.
Pros:
  • Quality and design
Cons:
  • A little pricey
Would recommend: Yes
Was it helpful to you? Yes | No

Best Stock

by Fish, Verified Owner from WI, United States Written on December 15, 2023
It brings 7.62 NATO recoil nicely inline with your shoulder. It puts you at a great level for red dots, but makes the factory Irons unusable.
Pros:
  • recoil absorbing
Cons:
  • Can't use iron sights.
Would recommend: Yes
Was it helpful to you? Yes | No

Parts from optics

by Black Rose, from IN, United States Written on November 8, 2023
Sent timely, excellent shape. Parts fit and work as advertised. Has improved item beyond my requirements.
Would recommend: Yes
Was it helpful to you? Yes | No

Tired of your G3 pattern rifle handling like a pike?

by Sal, Verified Owner from WA, United States Written on February 19, 2023
...then get this stock. Fits up solid and secure, military fielded by Scandinavian forces. Particularly excellent on carbine models. Really allows you to work toward getting proper eye relief on prism scopes, LPVOs.

Recommend not tightening the two small buffer bolts in the butt plate assembly during installation until you get the large buffer bolt in the Spuhr buffer tube threaded in.
Pros:
  • Rifle handling, optic usage, basically everything.
Cons:
  • price
Would recommend: Yes
Was it helpful to you? Yes | No

Awesome SR9 Mod

by Terance Kozlowski, Verified Owner from KY, United States Written on October 25, 2022
This stock is leagues above the standard cheek bone crusher. It lowers the boreline into the stock to increase handling at higher rates of fire. Plus its adjustable, so you can use it with your plate carrier!
Pros:
  • Quaility product
  • Adjustable and sturdy
  • Looks & functional
  • Looks & Fits Great!
Cons:
  • None
Would recommend: Yes
Was it helpful to you? Yes | No
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Last updated 2025-11-12 UTC.