FAB Defense GL-Core Buttstock is a matte black fiberglass reinforced polymer collapsible buttstock for AR-15/M4 platforms, fitting Mil-Spec or Commercial buffer tube diameters via included interchangeable buffer tube adapters. Features an integrated cheek weld, ergonomically shaped rubberized buttpad, two integrated QD rear sling swivel connectors, and an inverted positioning lever to prevent accidental opening. Compact, sleek design with no protruding parts to snag on gear. Can accept the optional GCCP cheek riser (sold separately). OAL 7.08, height 5.15, width 2.04. Weighs 9.55 oz. Safety note Follow all manufacturer installation instructions. Verify proper function and secure mounting before use. Comply with local firearm laws and regulations.