FAB Defense GL-Core Survival Synthetic Black Finish Rubber Butt Pad Stock for AR-Platform, Mil-Spec & Commercial Tube Compatible (Tube Not Included)

The FAB Defense GL-Core Survival stock is a modern AR-platform butt stock designed for shooters who want practical features without the bulk. Built to fit both mil-spec and commercial receiver tubes, this synthetic stock combines a textured rubber butt pad for shoulder comfort with an integrated magazine carrier—keeping a spare 5.56 mag within arm's reach when every second counts. Whether you're running defensive drills, hunting, or putting rounds downrange at the range, the GL-Core delivers the ergonomics of a standard M4-style stock while adding genuine utility that doesn't clutter your kit.

The fiberglass-reinforced polymer construction keeps weight minimal without sacrificing durability, and the sleek profile resists snagging on gear or webbing when moving between shooting positions. An anti-rattle mechanism holds the stock secure on your tube, eliminating the looseness that can develop during hard use. The rubber butt pad grips your shoulder to prevent slippage during recoil, and the design maintains the familiar controls and positioning of a traditional buttstock—no learning curve required.

The built-in magazine carrier accepts standard 5.56 NATO/.223 Rem AR magazines as well as FAB Defense Ultimag magazines. A quick-release button lets you swap mags fast, and ambidextrous sling swivel connectors give you mounting flexibility for single- or two-point setups. It's a no-frills upgrade that focuses on what actually matters: reliable performance, secure carry, and one less thing to fumble for when you need it most.

Key Features

• Integrated magazine carrier holds a ready spare 5.56 NATO/.223 Rem magazine
• Textured rubber butt pad resists shoulder slippage and absorbs recoil
• Anti-rattle mechanism ensures a solid, wobble-free fit on the receiver tube
• Fits both mil-spec and commercial diameter tubes
• Fiberglass-reinforced polymer construction balances durability and weight
• Quick-release button for fast magazine changes
• Ambidextrous sling swivel connectors for flexible carry options
• Low-profile design won't snag on tactical gear or webbing
• Maintains standard M4-style ergonomics and controls

Specifications

Frequently Asked Questions

Will this stock fit my AR with a commercial tube?

Yes. The GL-Core is compatible with both mil-spec and commercial diameter receiver tubes, so it will work with either type of AR-15 platform lower.

What magazines will the built-in carrier hold?

The integrated magazine carrier accommodates standard 5.56 NATO and .223 Rem AR-15 magazines, as well as FAB Defense Ultimag magazines.

Do I need to buy a buffer tube separately?

Yes. The stock itself is not included with a receiver tube; you will need a separate mil-spec or commercial tube to install it on your lower receiver.

What are the sling mounting options?

The GL-Core features ambidextrous quick-detach rear sling swivel connectors, allowing you to run a single-point or two-point sling setup based on your preference.