FAB Defense M4 Folding H&K MP5 Stock w/ GL-Core

5.00 out of 5
(2 customer reviews)
SKU: M4-MP5 P GL-Core Categories: , , Tags: , , , ,

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About the FAB Defense M4 Folding H&K MP5 w/ GL-Core Stock:

The FAB Defense M4 Folding H&K MP5 Stock w/ GL-Core Stock is an M4 style tube for MP5 rifles that will decrease your "on target time" and will improve shooting accuracy. This MP5 folding Tube is one of the best solutions for you if you are used to and prefer an M4/M16 style stock, thanks to the material it's made from (reinforced fiberglass polymer) this folding MP5 Tube is highly durable and super lightweight making it perfect for use in any condition at any time. The tube can collapse to 8 different lengths and does not require any gunsmith.

The M4 Style tube will allow you to put almost any M4/M16 style stocks on your Galil stock as the FAB Defense GL-CORE, GL-SHOCK and GLR-16 stocks. 

Will fit: H&K MP5


  • Optional Recoil reducing buffer will improve accuracy and “on target time” under rapid fire
  • Optional Cheek Rest 
  • 8 positions tube for optimal fit of the stock length to your battle stanch
  • Bolt on design for tight and easy fit on stamped receiver AK
  • Constructed from durable & lightweight fiberglass-reinforced polymer composite
  • No gunsmith required

About the GL-Core Stock:

The GL-CORE AR15 Stock collapsible, a lightweight tactical stock is made from fiberglass reinforced polymer making it highly durable for any kind of activity and all weather conditions. The GL-CORE AR15 Stock comes with two unique Anti-Rattle pieces that holds the stock firmly in place on your AR15 tube eliminating any unnecessary rattle, the stock comes with two of those pieces in order for the stock to fit both MIL-SPEC and Commercial tubes. Furthermore the buttstock's butt-pad in made out of a high-quality rubber to prevent it from slipping while shooting and thanks to its shape it is also easier to place it into your shoulder, therefore, it also increases the speed in which you enter a shooting position.

The stock also has the option to have an adjustable three-position cheek rest.

  "►See Assembly Video Here◄  



Video Review by Honest Outlaw Reviews:


About FAB Defense:

FAB Defense LOGO

Since its foundation, FAB-Defense has been leading in development and manufacture of the highest quality tactical equipment and weapon accessories for Israel’s Military and Police. Because FAB-Defense works in collaboration with Special Forces and SWAT teams worldwide. 

Furthermore, the State-of-the-Art engineering, manufacturing and quality assurance methods are joined by leading technologies ensuring the products produced exceed even the most strict industry standards. In addition, FAB Defense products are thoroughly tested in the harshest environments and under extreme conditions. Conditions that include freezing snow and scorching deserts by some of the best tactical units in the world. FAB unique production standards are first and foremost led by operational field experience, leading the way in tactical accessory operation.

520 g
48 mm
130 mm
250 mm

Additional information

Weight 520 g
Dimensions 250 × 48 × 130 mm

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Country of Manufacture




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2 reviews for FAB Defense M4 Folding H&K MP5 Stock w/ GL-Core

  1. Avatar
    5 out of 5

    Bob (verified owner)

    I got this stock for several resons but the main one was to change my WALTER HK MP5 SD6 .22lr version to a M4 Stock, as WALTER state that some thing made for a MP5 will fit by 80% a .22lr version, so took the chance to to see if it would fit, I got the stock and it ” did not fit “, but looking a bit more closely the reason it did not fit was the 2 rails in side the end cap we’re to longe, so using a Dremil type tool I removed 2 to 3mm off the rails, test an remove until the end cap went on and the rails fit in to the rail grooves on the side of the gun, the cap was now a good tight fit, the next thing was the take down pin holes in the bottom of the cap where out of line with the holes in the main body of the gun, so I elongated the 2 hole in the vertical plane by 2mm Leving the width the same until the take down pin passed through the holes in the cap and the main body of the gun locking the stock to the gun in a tight fit, there was a tiny bit of movement so removed the stock and put a piece 3mm foam cut to fit inside the cap, put it back on the gun for a great tight fit, the stock will fit the .22lr vertion with a bit of a modification, add to that the stock tube has a 3 to 4 degrees down angle to the end cap that makes a better holding and sighting position, add a cheek piece that you can buy, add to the order, it works great if you have a scope fitted, the price is great as you get a complete M4 stock, which will fold, with the chance to buy 2 extra items as you order the stock and as you now have an M4 butt cap, stock tube, you can now fit any standard M4 stock to your gun, great stock, with a little work, great price, see photo’s in the gallery of my WALTHER MP5 SD6 .22lr. ( please note the information to change the stock to fit a MP5 .22lr vertion is my experience and if you choose to use this information your self with this stock to fit your Mp5 .22lr version, it’s solely down to you, but good luck if you go a head ). Fantastic stock, great price, glad I took the chance as I now have WALTER MP5 SD5 .22lr gun with an M4 stock. 5*plus.

  2. Avatar
    5 out of 5

    Patrick (verified owner)

    Great folding/collapsable stock system. Fits perfectly like a dream without sanding or filing. Looks so cool, but it’s also an excellent tool to proof the incredible accuracy of the famous MP5.

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