You can find the Fab Defense GL-CORE AR-15/M4 Stock Black here.

The Fab Defense GL-CORE AR-15/M4 Stock has an integrated cheek weld, an ergonomic buttpad, and an interchangeable tube adapter for a secure fit with Mil-Spec or Commercial buffer tubes. The adjustment lever is positioned so that it cannot accidentally be activated. An ambidextrous, quick-detach rear sling swivel is built into the stock. Made with a lightweight fiberglass reinforced polymer composite.

Color: Black