FAB Defense AR-15 GL-CORE S Buttstock – CQB Optimized Combat Stock

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Optimized Combat Stock For Ultimate Weapon Handling & Performance

The FAB Defense GL-CORE S CQB Optimized Combat Buttstock is an upgrade for AR-15/M4 Platforms to improve weapon handling and performance at shorter ranges. It is known to be specifically designed for one of the best Israeli Counter-Terrorism units, to be used as a primary buttstock.

The design of the GL-Core S buttstock is the result of the implemented design changes that have been requested from multiple sources including law enforcement units. It can provide AR operators a reliable stock that is short and compact for CQB scenarios but will still provide strength and stability for mid-range engagements.

FAB Defense AR-15 GL-CORE S Buttstock - CQB Optimized Combat Stock - Hero

Works On Both Mil-Spec & Commercial Buffer Tubes

The FAB Defense AR-15 GL-CORE S Buttstock was designed with integrated cheek weld, ergonomic buttpad, and interchangeable buffer tube adapters so that you can securely fit them on both Mil-Spec and commercial buffer tubes. It amazingly provides an unmatched fit on Mil-Spec and Commercial buffer tubes, with a high level of efficiency and comfort.

It is constructed from rugged fiberglass reinforced polymer composite that creates a tough build without the added weight of heavier materials. It also has two integrated QD rear sling swivel connectors so that you can seamlessly attach a sling for a more comfortable carry.


  • Small and compact allowing for easy maneuverability during CQB
  • Flat-faced rubberized butt-pad designed for use with and without tactical body armor
  • Interchangeable buffer tube adapters for a tight fit on Mil-Spec and Commercial buffer tubes
  • Integrated cheek weld optimized for the M4/AR15 platforms
  • No protruding parts, will not get caught on gear or webbing
  • Inversed positioning lever will not open accidentally
  • Two integrated quick-detach rear sling swivel connectors
  • Made of durable and light-weight fiberglass reinforced polymer composite


  • Platform: M4, AR-15
  • Hand: Ambidextrous
  • Fabric/Material: Fiberglass Reinforced Polymer
  • Weight: 210 gr
  • Width: 51 mm
  • Height: 109 mm
  • Length: 165 mm

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Have Questions About this Product?

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

Fab Defense Limited Lifetime Warranty

  • FAB DEFENSE warrants to the original end-user/customer that the products specified below are free from defects in materials and workmanship.
  • Subject to the provisions, conditions, and limitations set forth below, FAB DEFENSE will, at its sole discretion, either repair or replace any part of its products found and proven to be defective by reason of improper workmanship or materials or damage due to harsh service conditions.
  • FAB DEFENSE will provide repair parts or replacement products on an exchange basis, and such parts shall be either new or refurbished, provided they are functionally equivalent to new parts.
  • In the event that FAB DEFENSE is unable to repair or replace the defective product, it will refund the current value of the product at the time the warranty claim was made.
  • This limited lifetime warranty shall not cover any damage inflicted on this product as a result of improper installation, accident, abuse, misuse, natural disaster or modification. This lifetime warranty shall not apply to any product that had been sold as used/second-hand or that had been resold.
  • This limited lifetime warranty shall not extend to any product or damage to a product caused by failure to follow the instruction manual, through abuse or misuse or improper usage of the products.

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.

Customer Reviews

Based on 4 reviews
Cory Dailey
Perfect for my mini recce!

Well made and designed for its purpose. The bottom curve on the bottom of the buttstock works well with armor. No hang-ups.

Thanks for the review! We're glad to hear that you're happy with the GL-CORE S Buttstock - CQB Optimized Combat Stock.

Michael Cohen

Very satisfied. Feels good, easy to put on, not big, I like where the QD points are, and that there on either side.

Thanks for the great feedback! We're glad you're happy with your purchase.

Austin Ball

Bought it for a commercial stock however doesnt collapse all the way down due to the angle of the commercial tube. This is the only reason i didnt give it a 5 star. Replaced the tube with a mil spec (should have done that to start with instead of being cheap) and it works absolutley flawless. No slop or excessive stiffness. Is it the best stock ive ever had? No, however for the price and feel it is near the top of the list for sure.

Bullseye McBride

I have not received it yet

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.