The FAB Defense GL-CORE M CP Buttstock (brand part no. FXGLCOREMAGCPB) is built for AR-15, M16, and M4 shooters who want a spare magazine within reach without adding a separate carrier to their gear. A built-in, concealed compartment holds one spare 5.56×45/.223 Rem magazine, including FAB Defense’s own Ultimag magazines, right inside the stock body. An anti-rattle mechanism locks the stock firmly onto the buffer tube, and a high-quality rubber butt pad keeps it from slipping against the shoulder shot after shot. It fits both Mil-Spec and commercial buffer tubes, making it a simple drop-in upgrade for most AR builds.

Key Specifications

• Includes a built-in, concealed magazine carrier that holds one spare 5.56×45/.223 Rem AR magazine.
• Compatible with FAB Defense Ultimag magazines as well as standard AR magazines.
• An anti-rattle mechanism holds the stock firmly against the buffer tube to eliminate wobble.
• Features a rubber butt pad that resists slipping against the shoulder.
• Fits both Mil-Spec and commercial buffer tubes.

Frequently Asked Questions

Can I carry a spare magazine in the stock? Yes, a built-in concealed compartment holds one spare 5.56×45/.223 Rem magazine.

Will this fit my buffer tube? Yes, it fits both Mil-Spec and commercial buffer tubes.

Buy the FAB Defense GL-CORE M CP Buttstock with Magazine Carrier, Black

Keep a reload on the gun instead of a plate carrier or range bag with a stock built to carry it. Browse more AR-15 stocks and forends from FAB Defense and order it fast from our Lubbock, Texas gun shop.