Since its inception, FAB Defense has been leading in development and manufacture of high quality, cutting-edge tactical equipment and weapon accessories for Israel's Military and Police. The FAB Defense GLR 16 AR-15 buttstock provides the user with enhanced versatility with an adjustable cheek rest and a unique "Anti-Rattle" mechanism allows for use with both Mil-Spec and Commercial buffer tubes. Features: Enhanced non-slip recoil absorbing pad provides steady positioning with body armor Three integrated sling attachment slots Sealed storage compartment for two CR123 or AA batteries with "anti-rattle" mechanism to eliminate noise Adjustable cheek rest for comfort and accuracy