FAB Defense GL-Core Matte Black Synthetic Buttstock for AR-Platform (FXGLCOREB)

The FAB Defense GL-Core matte black synthetic buttstock for AR-platform rifles gives you a comfortable, secure cheek weld and shoulder pocket without the bulk or weight of traditional fixed stocks. Built from fiberglass-reinforced polymer, it's engineered for shooters who want ergonomic control and fast target acquisition whether you're running drills at the range, hunting, or training with your modern sporting rifle. The GL-Core uses interchangeable buffer tube adapters, so it works with both Mil-Spec and commercial tubes—no guessing, no gaps.

The integrated cheek rest is built into the rubberized buttpad, giving you a natural anchor point for consistent sight picture without adding bulk to your setup. The compact design keeps things streamlined; there are no protruding edges to snag on your gear, sling, or tactical kit during movement or transitions. The inverted positioning lever stays put—no accidental opens when you're shouldering or moving through rough country. A pair of integrated quick-detach sling swivel connectors gives you flexibility for how you run your sling, whether that's a single-point, two-point, or none at all.

At its core, the GL-Core is about getting a stock that fits your tube first try and feels good when you shoot. Light weight, durable, and purpose-built for the shooter who doesn't want to fuss with adapters or worry about a loose fit degrading their rifle's handling.

Key Features

• Integrated cheek rest and rubberized buttpad for comfortable, repeatable shouldering
• Interchangeable buffer tube adapters fit both Mil-Spec and commercial tubes
• Compact, snag-free design with no protruding parts
• Inverted positioning lever prevents accidental opening
• Two integrated quick-detach sling swivel connectors
• Fiberglass-reinforced polymer composite construction for durability and light weight
• Matte black finish

Specifications

Frequently Asked Questions

Will the GL-Core fit my AR buffer tube?

Yes. The GL-Core comes with interchangeable adapters that work on both Mil-Spec and commercial buffer tubes, so it fits standard AR-platform rifles.

What's included with the buttstock?

The GL-Core comes with the stock, integrated cheek rest, rubberized buttpad, interchangeable buffer tube adapters, and two quick-detach sling swivel connectors.

Can I attach a sling to this stock?

Yes. Two integrated quick-detach sling swivel connectors are built into the GL-Core, giving you options for single-point or two-point sling mounting.

Is the positioning lever secure during shooting or movement?

The lever uses an inverted design that resists accidental opening, so it stays locked during shouldering, transitions, and rough handling.