FAB Defense GL-Core Matte Black Synthetic Buttstock for AR-Platform (FXGLCOREB)
$77.20
F.A.B. Defense
FAB Defense GL-Shock Anti-Rattle Buttstock - Matte Black for M4/M16 & AR-Platform
$100.10
- Firearm Group:
- Rifle
- Finish-Color:
- Black
- Material:
- Polymer
- Swivel Studs:
- Yes
The FAB Defense GL-Shock anti-rattle buttstock is a recoil-reducing AR-platform stock built around a patented shock-absorption system. If you run an AR-15, M4, or M16 and are tired of felt recoil, rattle, or fumbling with generic stocks, the GL-Shock addresses all three with a spring-loaded mechanism housed inside a rugged polymer body. It fits both Mil-Spec and Commercial buffer tubes, so you won't need to swap your lower receiver to use it, and the textured rubber butt pad gives you a solid purchase whether you're shooting prone, off bags, or standing.
The GL-Shock arrives with a pair of QD sling swivel sockets molded into the sides—one left, one right—letting you transition between single-point and two-point carries without adapters. There's also a watertight battery storage compartment built in, handy if you run an optic or light that sips AA or CR123 juice. Everything comes in matte black, which blends with modern AR furniture and resists glare on the range or in the field.
Real-world shooters appreciate the anti-rattle design: loose stocks kill accuracy and drive you crazy between shots. The internal spring mechanism reduces play without adding bulk, and the Mil-Spec/Commercial compatibility means you're not locked into one ecosystem. This is a stock that works hard on hunting rigs, patrol carbines, and three-gun setups alike.
Key Features
- Patented recoil-reducing spring mechanism inside the stock body
- Fits both Mil-Spec and Commercial diameter buffer tubes
- Integral ribbed rubber butt pad for non-slip contact
- QD sling swivel socket points on both sides
- Watertight battery storage compartment
- Matte black finish
Specifications
| Brand | F.A.B. Defense |
| Model | GL-Shock Anti-Rattle Buttstock |
| Finish | Matte Black |
| Compatibility | AR-15, M4, M16, and AR-platform rifles with Mil-Spec or Commercial buffer tubes |
| Butt Pad | Integral ribbed rubber |
| Sling Attachment | 2 QD swivel sockets (left and right) |
| Storage | Watertight battery compartment |
Frequently Asked Questions
Will the GL-Shock fit my AR-15?
Yes, the GL-Shock is designed for AR-15, M4, M16, and AR-platform rifles. It works with both Mil-Spec and Commercial diameter buffer tubes, so it will fit most modern AR lowers without modification.
Does it come with sling mounts?
The GL-Shock has two molded QD sling swivel sockets built in—one on each side. You'll need to supply your own QD swivel attachments, but the mounting points are ready to go.
What is the battery storage compartment for?
The watertight compartment stores spare batteries (typically AA or CR123) for optics, lights, lasers, or other powered gear you're running on your rifle. It keeps spares dry and accessible.
How does the recoil-absorbing mechanism work?
The GL-Shock contains a spring-based internal mechanism that reduces felt recoil and eliminates stock rattle by minimizing movement between the stock and buffer tube. This improves stability on target and reduces the noise that comes from a loose setup.
