FAB Defense GL-Core AR-15/M4 Buttstock with Adjustable Cheek Rest – Black

The FAB Defense GL-Core AR-15/M4 Buttstock (brand part no. FXGLCORECPB) combines an integrated cheek weld with an adjustable cheek-rest, letting shooters set a consistent, repeatable sight picture behind a red dot, magnified optic, or iron sights. FAB Defense shapes the buttpad from rubberized material for quick, secure shouldering and easier weapon maneuvering, and molds the body from durable, lightweight fiberglass-reinforced polymer composite. An interchangeable tube adapter gives the stock an unmatched fit on both Mil-Spec and Commercial buffer tubes, so it works across most AR-15/M4 builds without swapping receiver extensions. Two integrated quick-detach rear sling swivel connectors add sling-mounting flexibility without extra hardware. Finished in black, it’s a comfortable, adjustable upgrade for any AR-pattern rifle.

Key Specifications

• Features an integrated cheek weld for a consistent, repeatable sight picture.
• Includes an adjustable cheek-rest to match optic or iron-sight height.
• Uses a rubberized buttpad for quick, secure shouldering.
• Fits both Mil-Spec and Commercial buffer tubes via an interchangeable tube adapter.
• Molded from fiberglass-reinforced polymer composite for a durable, lightweight build.
• Includes two integrated QD rear sling swivel connectors.
• Finished in black to match most AR-15 builds.

Frequently Asked Questions

What buffer tubes does it fit? Both Mil-Spec and Commercial tubes, via an interchangeable tube adapter.

Does it include sling mounting points? Yes, two integrated QD rear sling swivel connectors.

Can I adjust the cheek height? Yes, the cheek-rest is adjustable to match your optic.

Buy the FAB Defense GL-Core AR-15/M4 Buttstock with Adjustable Cheek Rest – Black

Get a comfortable, repeatable cheek weld on your next AR build. Order the FAB Defense GL-Core from our AR-15 stocks and forends selection at our Lubbock, Texas gun shop for fast, direct shipping.