FAB Defense GLR-16 Adjustable Cheekrest & Anti-Rattle Mechanism for AR/M4 - Matte Black SyntheticF.A.B. Defense$85.30
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F.A.B. Defense
The FAB Defense GLR-16 is a fixed AR-15 buttstock built for shooters who want practical storage and a secure cheek weld without the complexity of a collapsible system. This matte black synthetic stock fits both mil-spec and commercial diameter buffer tubes, so whether you're running a factory tube or an aftermarket upgrade, the GLR-16 will drop right in. It's purpose-built for AR platform rifles and M4-style carbines—the kind of gun that lives in your truck, your safe, or on your next hunting trip.
What sets the GLR-16 apart is the integrated battery compartment tucked inside the stock body. A water-resistant sealed space holds two CR-123A or AA batteries—essential for keeping spares dry and accessible when you need them for your optics, lights, or other gear. The anti-rattle design keeps everything quiet during transitions and movement. Add in the built-in sling attachment points—one forward slot and two rear slots, plus two ambidextrous QD sling sockets—and you've got a stock engineered for working rifles, not bench guns.
The rubberized butt pad is contoured for a stable, repeatable shoulder position whether you're at the range or in the field. For hunters, tactical shooters, and AR enthusiasts who value durability and functionality over adjustability, the GLR-16 is a no-nonsense upgrade that handles the job.
| Brand | F.A.B. Defense |
| Model | GLR-16 |
| Finish | Matte Black |
| Material | Synthetic |
| Type | Fixed Stock |
| Buffer Tube Compatibility | Mil-Spec and Commercial |
| Platform | AR-15 / M4 / AR Platform |
| Battery Compartment | Water-resistant; holds (2) CR-123A or AA batteries |
| Sling Attachment Points | 4 (1 front slot, 2 rear slots, 2 QD sockets) |
Yes. The GLR-16 is designed for AR platform rifles and fits both mil-spec and commercial diameter buffer tubes, which covers the vast majority of AR-15 and M4-style builds.
The compartment holds two CR-123A or AA batteries. It's water-resistant, making it ideal for keeping spare batteries dry for optics, weapon lights, and other gear.
Yes. The GLR-16 includes one front sling slot, two rear sling slots, and two ambidextrous QD sling sockets, giving you multiple mounting options to match your preferred sling setup.
The GLR-16 is a fixed stock—it does not collapse. If you need a collapsible option, you'll want to look at a different platform.
F.A.B. Defense
The FAB Defense GLR-16 is a fixed AR-15 buttstock built for shooters who want practical storage and a secure cheek weld without the complexity of a collapsible system. This matte black synthetic stock fits both mil-spec and commercial diameter buffer tubes, so whether you're running a factory tube or an aftermarket upgrade, the GLR-16 will drop right in. It's purpose-built for AR platform rifles and M4-style carbines—the kind of gun that lives in your truck, your safe, or on your next hunting trip.
What sets the GLR-16 apart is the integrated battery compartment tucked inside the stock body. A water-resistant sealed space holds two CR-123A or AA batteries—essential for keeping spares dry and accessible when you need them for your optics, lights, or other gear. The anti-rattle design keeps everything quiet during transitions and movement. Add in the built-in sling attachment points—one forward slot and two rear slots, plus two ambidextrous QD sling sockets—and you've got a stock engineered for working rifles, not bench guns.
The rubberized butt pad is contoured for a stable, repeatable shoulder position whether you're at the range or in the field. For hunters, tactical shooters, and AR enthusiasts who value durability and functionality over adjustability, the GLR-16 is a no-nonsense upgrade that handles the job.
| Brand | F.A.B. Defense |
| Model | GLR-16 |
| Finish | Matte Black |
| Material | Synthetic |
| Type | Fixed Stock |
| Buffer Tube Compatibility | Mil-Spec and Commercial |
| Platform | AR-15 / M4 / AR Platform |
| Battery Compartment | Water-resistant; holds (2) CR-123A or AA batteries |
| Sling Attachment Points | 4 (1 front slot, 2 rear slots, 2 QD sockets) |
Yes. The GLR-16 is designed for AR platform rifles and fits both mil-spec and commercial diameter buffer tubes, which covers the vast majority of AR-15 and M4-style builds.
The compartment holds two CR-123A or AA batteries. It's water-resistant, making it ideal for keeping spare batteries dry for optics, weapon lights, and other gear.
Yes. The GLR-16 includes one front sling slot, two rear sling slots, and two ambidextrous QD sling sockets, giving you multiple mounting options to match your preferred sling setup.
The GLR-16 is a fixed stock—it does not collapse. If you need a collapsible option, you'll want to look at a different platform.