FAB Defense GL-CORE M AR-15/M4 Stock with Magazine Carrier

FAB Defense GL-CORE M AR-15/M4 Stock with Magazine Carrier

The FAB Defense GL-CORE M combines the standard GL-CORE collapsible stock with an integrated magazine carrier built into the rear stock assembly. It is designed for AR-15, M4, and other compatible platforms using a carbine-style receiver extension, giving the shooter adjustable length of pull while keeping a spare magazine mounted directly on the rifle.

The stock retains the familiar GL-CORE architecture, including broad cheek-weld surfaces, a rubberized buttpad, and compatibility with both MIL-SPEC and commercial-pattern carbine tubes. The integrated magazine carrier is the key difference between this version and the standard GL-CORE.

Key Features

• Integrated spare magazine carrier
• Designed for AR-15, M4, and compatible platforms
• Collapsible stock with adjustable length of pull
• Compatible with MIL-SPEC and commercial-pattern carbine receiver extensions
• Interchangeable tube adapters for proper fit
• Broad cheek-weld surfaces
• Rubberized buttpad
• Inverted adjustment lever helps reduce accidental activation
• Integrated sling attachment provisions
• Reinforced polymer construction
• Available in Black, OD Green, and Flat Dark Earth

Integrated Magazine Carrier

The defining feature of the GL-CORE M is the built-in magazine carrier positioned at the rear of the stock. It allows a compatible spare magazine to be stored directly on the firearm rather than in a separate pouch or carrier.

This can be useful for rifles kept in a ready configuration, where keeping one additional magazine attached to the firearm reduces reliance on separate load-bearing equipment. The magazine carrier is integrated into the stock assembly rather than added as a separate accessory.

GL-CORE Stock Architecture

The GL-CORE M retains the same basic stock geometry as the standard GL-CORE. It provides adjustable length of pull through the carbine receiver extension while maintaining a broader cheek surface than many minimalist AR stocks.

The rubberized buttpad provides additional traction against the shoulder, while the recessed adjustment lever is positioned to help reduce unintended stock movement during handling.

MIL-SPEC and Commercial Tube Compatibility

FAB Defense uses interchangeable adapters so the GL-CORE M can be configured for both MIL-SPEC and commercial-pattern carbine receiver extensions. Buyers should identify their receiver-extension type and use the correct adapter before installation.

This dual-fit system makes the stock suitable for a wider range of AR-pattern rifles and other compatible firearms that use a carbine-style tube.

Product Specifications

• Manufacturer: FAB Defense
• Model: GL-CORE MAG
• Type: Collapsible Stock with Integrated Magazine Carrier
• Primary Platform: AR-15 / M4 and Compatible Platforms
• Receiver Extension Compatibility: MIL-SPEC and Commercial Carbine Tubes
• Length of Pull: Adjustable
• Magazine Storage: Integrated Rear Magazine Carrier
• Buttpad: Rubberized
• Construction: Reinforced Polymer

Color Variants

• Black: FX-GLCOREMAGB | UPC 7290111586521
• OD Green: FX-GLCOREMAGG | UPC 7290111586538
• Flat Dark Earth: FX-GLCOREMAGT | UPC 7290111586545

Fitment Note: The GL-CORE MAG is designed for compatible carbine-style receiver extensions. Buyers should verify both receiver-extension fit and magazine compatibility before use.

The FAB Defense GL-CORE M is best suited to shooters who want the comfort and adjustability of the standard GL-CORE with the added utility of an integrated spare-magazine carrier. It adds onboard magazine storage without giving up the collapsible stock format or dual MIL-SPEC/commercial tube compatibility.

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