The Fab Defense GL-CORE S AR-15/M4 Stock is a CQB optimized combat stock that was specifically designed for one of the best Israeli Counter-Terrorism units. The result is a shorter and more compact version of the GL-Core buttstock. The GL-CORE S has an integrated cheek weld, an ergonomic buttpad and an interchanging tube adapter for a secure fit with Mil-Spec or Commercial buffer tubes. An ambidextrous quick detach rear sling swivel is built in to the stock. Made with a light-weight fiberglass reinforced polymer composite.