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Questions & Answers
is this for a mil spec or commercial buffer tube? Expert Answer

Both, it comes with adapters to fit either tube.

by Ethan C., Gear Expert, January 20, 2021
Will this fit a (PSA) PA 10 20” barrel? Manufacturer Answer

This stock will fit any commercial tube

by FAB Defense, Manufacturer, January 9, 2025
Customer Reviews
Helpful Positive Review
Fits perfect by JD, March 17, 2024
I bought three different stocks, this one surpassed the others. Very tight on my UTG buffer tube, the pad fits nicely into my shoulder well, the compartment is extremely efficient for my 123c batteries, and after running it under water for a few mins...
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1/1 found this helpful
Helpful Positive Review
Good but not great. by David, Verified Owner, April 13, 2024
The idea of the extra spring for heavy recoil is fantastic. This design almost meets that. Basically if you have a commercial tube which is 1.168 inch OD this fits correctly. A mil spec tube which is 1.148 fits rather sloppy. Yes it’s only .020 but w...
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3/3 found this helpful
Helpful Positive Review
3rd Fab-Defense Stock by Banayaga, Verified Owner, May 9, 2024
Great butt stock. Yes, it does have a spring in it. Yes, it is very stiff. If you're looking for more adjustablity, go with the GLCore models. I own both, and they have different uses, GL Shock is better for higher recoiling calibers such as AR 12...
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2/2 found this helpful
Helpful Positive Review
This is what I was looking for. by Rob, January 20, 2024
Quality material. OD Green is always superior. Reduction in felt recoil.
1/1 found this helpful
Helpful Positive Review
I didn't install this Fab Defense recoil reducing stock on an AR but rather on an AK with an M4 stock adapter. Personally I don't see the need for this stock on a 5.56/223 AR but it works great at reducing recoil on the AK in 7.62X39. Plus the butt...
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6/6 found this helpful
Helpful Positive Review
Great Stock by TPav, April 22, 2020
I’m running this on a 450 Bushmaster and the difference is beyond words. If you are running anything more than 223 you need this buffered stock. Look fit and finish are all very high end. Before the stock I could shoot 4-5 rounds of 450 now I can ...
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15/16 found this helpful
Read All 45 Reviews

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Product Info for FAB Defense GLSHOCK AR-15/M16/M4 Recoil Reducing Stock Polymer

Outfit your weapon with this FAB Defense GLSHOCK AR-15/M16/M4 Recoil Reducing Stock Polymer to vastly reduce your recoil to gain complete control of your shots down range. The sleek design of these FAB Defense AR15 Stocks have no protruding parts so they won't snag on your gear and webbing. For increased gear carrying capacity, this FAB Defense M4/M16 Shock Absorbing Buttstock contains a watertight storage compartment for batteries, zip ties, and anything else you may need for tactical operations. You can use this device on both MIL-SPEC and commercial aftermarket tubes. Plus, there's a ribbed rubber butt pad that has non-slip properties for enhanced recoil control and a more comfortable shooting experience. Equip the FAB Defense GL-SHOCK Rifle Buttstock today to rip shots down range with confidence and laser-like precision.image

Specifications for FAB Defense GLSHOCK AR-15/M16/M4 Recoil Reducing Stock Polymer:

Manufacturer: FAB Defense
Gun Model: M4, AR-15
Gun Type: Rifle
Weight: 0.597 lb, 271 g
Length: 180 mm, 7.09 in
Height: 131 mm, 5.16 in
Width: 2.05 in, 52 mm

Features of FAB Defense GLSHOCK AR-15/M16/M4 Recoil Reducing Stock Polymer:

  • Unique Patented "Anti-Rattle" Mechanism
  • Sleek New Design with No Protruding Parts,Will Not Get Caught on Gear and Webbing
  • Unique New Slick and Quick Operated Inversed Positioning Lever
  • Integral Ribbed Rubber Butt Pad with a Non Slip Design
  • Integrated Quick Detach Sling Swivel Connectors on Both Sides
  • Watertight Battery Storage for Two CR123A 3V Lithium Batteries / AA 1.5v
  • Fits Perfectly on Both Tubes - MIL-SPEC and Commercial Aftermarket
  • Made from Mill-Spec Reinforced Polymer Composite

Package Contents:

  • FAB Defense GLSHOCK AR-15/M16/M4 Recoil Reducing Stock Polymer, 1S0-BSC-GLSHOCK

FAB Defense GLSHOCK AR-15/M16/M4 Recoil Reducing Stock Polymer Orderable Models

List of Orderable Models

  • Open Box, Dealer Demo, FAB Defense GLSHOCK AR-15/M16/M4 Recoil Reducing Stock Polymer, OD Green, FX-GLSHOCKG , MPN: FX-GLSHOCKG-DMO , Code: 1S0-BSC-GLSHOCK-FX-GLSHOCKG-DMO-OB-A
  • Open Box, Dealer Demo, FAB Defense GLSHOCK AR-15/M16/M4 Recoil Reducing Stock Polymer, Flat Dark Earth, FX-GLSHOCKT , MPN: FX-GLSHOCKT-DMO , Code: 1S0-BSC-GLSHOCK-FX-GLSHOCKT-DMO-OB-A
  • FAB Defense GLSHOCK AR-15/M16/M4 Recoil Reducing Stock Polymer, Flat Dark Earth, FX-GLSHOCKT , MPN: fx-glshockt , UPC: 7290105945877 , Code: 1S0-BSC-GLSHOCK-FX-GLSHOCKT
  • FAB Defense GLSHOCK AR-15/M16/M4 Recoil Reducing Stock Polymer, OD Green, FX-GLSHOCKG , MPN: fx-glshockg , UPC: 7290105945860 , Code: 1S0-BSC-GLSHOCK-FX-GLSHOCKG
  • FAB Defense GLSHOCK AR-15/M16/M4 Recoil Reducing Stock Polymer, Black, FX-GLSHOCK , MPN: fx-glshock , UPC: 7290105940704 , Code: 1S0-BSC-GLSHOCK-FX-GLSHOCK

FAB Defense GLSHOCK AR-15/M16/M4 Recoil Reducing Stock Polymer Unavailable & Discontinued Models

List of Unorderable Models

  • DEMO, FAB Defense GLSHOCK AR-15/M16/M4 Recoil Reducing Stock Polymer, Black, FX-GLSHOCK , MPN: FX-GLSHOCK-DEMO , Code: 1S0-BSC-GLSHOCK-FX-GLSHOCK-DEMO
  • FAB Defense GLSHOCK AR-15/M16/M4 Recoil Reducing Stock Polymer, GL-SHOCK , MPN: GL-Shock , UPC: 879015003852 , Code: 1S0-BSC-GLSHOCK-GL-SHOCK
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