The integrated cheek weld, ergonomic buttpad and an interchanging tube adapter of the FAB Defense Stock Skeleton GL Core, provide an unmatched fit on Mil-Spec and Commercial buffer tubes, with a high level of efficiency and comfort. FeaturesErgonomically shaped rubberized butt-pad for quick shouldering and easy maneuvering of the weaponInterchangeable buffer tube adapters for a tight fit on Mil-Spec and Commercial buffer tubesIntegrated cheek weld in an overall compact and sleek designNo protruding parts, will not get caught on gear or webbingInversed positioning lever will not open accidentlyTwo integrated quick detach rear sling swivel connectorsMade of durable and light-weight fiberglass reinforced polymer composite