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Questions & Answers
Will this fit commercial? Expert Answer

It fits both commercial and mil-spec buffer tubes.

by Jonathan D., Gear Expert, May 8, 2018
Will it fit well with S&W AR15 and AR10 Manufacturer Answer

It will work with an AR15. Wont fit an AR10

by FAB Defense, Manufacturer, April 9, 2025
Customer Reviews
Helpful Positive Review
I purchased this butt stock for my AR-10 to replace the original garden variety 6 position AR carbine stock with Limbsaver recoil pad. I had added the Limbsaver pad to the original stock to tame the recoil, however I still got a jolt to my jaw each t...
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4/4 found this helpful
Helpful Positive Review
I bought one on a whim and after using it bought 2 more. Yes it requires a love tap to get it to initially slide on milspec buffer and it is slightly loose on the tube when installed but this thing performs! I personally didn't really care about sli...
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7/7 found this helpful
Helpful Positive Review
GLSHOCKP Recoil- Reducing Buttstock by kbw4570, July 24, 2020
Great product! I have several and highly recommend! The prices are as good as I could find. Shipping was a little longer than normal, dues to Covid-19 I am assuming. have no complaints regarding the product.
2/2 found this helpful
Helpful Positive Review
Fab Defense Shock absorbing Stock by Hennard, Verified Owner, November 12, 2023
Works as advertised, Nice Cheek riser won't get caught on beard, but the only thing I don't like is the " HARD BUTT PAD " WISH IT HAD SOME GIVE, B-.
1/1 found this helpful
Helpful Positive Review
Sturdy fit by Gunny, November 14, 2023
Fits tightly with no play. Aesthetically pleasing, a great addition to my AR build
1/1 found this helpful
Helpful Positive Review
Gl-shock stock by fab defense by Andy, May 22, 2023
Impressive stock. I wasn't expecting it to work, but it really works well on my 50bmg. Fits a little loose on milspec tube but nice and snug on commercial. (( The only negative, i can say is, it will pull you facial hair. ))
2/2 found this helpful
Read All 33 Reviews
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Product Info for FAB Defense GLSHOCKCP Recoil-Reducing M4/M16 Buttstock

With a patented "anti-rattle" mechanism, this FAB Defense GLSHOCKCP Recoil-Reducing M4/M16 Buttstock brings loads of utility to your weapon. These AR15 Stocks crafted by FAB Defense are incredibly versatile, fitting both MIL-SPEC and commercial aftermarket tubes. The FAB Defense GL-SHOCK CP Shock-Absorbing Buttstock has no protruding parts so that it won't get caught on your gear while mobile in the field. Additionally, the inversed positioning lever can be quickly activated while QD swing swivel connectors allow for sling attachment so that you can customize the way you carry your rifle. Use the adjustable cheek rest to find the most comfortable shooting stance while you perfectly peg targets from plenty of yards out. Grab your FAB Defense M4/AR15 Shock-Absorbing Buttstock today to enhance your shooting experience and see what your rifle is truly capable of in the field.image

Specifications for FAB Defense GLSHOCKCP Recoil-Reducing M4/M16 Buttstock:

Manufacturer: FAB Defense
Gun Model: M4, AR-15
Gun Type: Rifle
Weight: 0.597 lb, 271 g
Length: 180 mm, 7.09 in
Additional Features: Compatible with Buffer tubes, in Commercial or Mil-Spec diameters
Height: 131 mm, 5.16 in
Width: 2.05 in, 52 mm

Features of FAB Defense GLSHOCKCP Recoil-Reducing M4/M16 Buttstock:

  • 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 "QD" 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 Composite Polymer
  • With an Adjustable Cheek Rest

Package Contents:

  • FAB Defense GLSHOCKCP Recoil-Reducing M4/M16 Buttstock, 1S0-BSC-GLSHOCKCP

FAB Defense GLSHOCKCP Recoil-Reducing M4/M16 Buttstock Orderable Models

List of Orderable Models

  • Open Box, Dealer Demo, FAB Defense GLSHOCKCP Recoil-Reducing M4/M16 Buttstock, w/Cheek Rest, Flat Dark Earth, FX-GLSHOCKCPT , MPN: FX-GLSHOCKCPT-DMO , Code: 1S0-BSC-GLSHOCKCP-FX-GLSHOCKCPT-DMO-OB-A
  • FAB Defense GLSHOCKCP Recoil-Reducing M4/M16 Buttstock, w/Cheek Rest, Flat Dark Earth, FX-GLSHOCKCPT , MPN: fx-glshockcpt , UPC: 7290105945891 , Code: 1S0-BSC-GLSHOCKCP-FX-GLSHOCKCPT
  • FAB Defense GLSHOCKCP Recoil-Reducing M4/M16 Buttstock, w/Cheek Rest, OD Green, FX-GLSHOCKCPG , MPN: fx-glshockcpg , UPC: 7290105945884 , Code: 1S0-BSC-GLSHOCKCP-FX-GLSHOCKCPG
  • FAB Defense GLSHOCKCP Recoil-Reducing M4/M16 Buttstock, w/Cheek Rest, Black, FX-GLSHOCKCP , MPN: fx-glshockcp , UPC: 7290105940711 , Code: 1S0-BSC-GLSHOCKCP-FX-GLSHOCKCP

FAB Defense GLSHOCKCP Recoil-Reducing M4/M16 Buttstock Unavailable & Discontinued Models

List of Unorderable Models

  • DEMO, FAB Defense GLSHOCKCP Recoil-Reducing M4/M16 Buttstock, w/Cheek Rest, Black, FX-GLSHOCKCP-DEMO , MPN: FX-GLSHOCKCP-DEMO , Code: 1S0-BSC-GLSHOCKCP-FX-GLSHOCKCP-DEMO
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