MDT SRS-XF, Skeleton, Folding Stock Kit, Matte Finish, Flat Dark Earth, Fits MDT XTN Stock Interface 103452-FDE The MDT Skeleton Rifle Stock XF (Folding) Buttstock was designed to provide the shooter with best-in-class strength and ergonomics" with an emphasis on adjustability and comfort. Length of pull (LOP) can be easily adjusted and fine-tuned with the thumbwheel" and locked in place with thumb screws or set screws (both included). The buttpad can be adjusted up and down as well as canted left or right" to form fit the shoulder pocket of any shooter. Achieving the perfect cheek weld is a breeze" simply loosen the set screws and adjust height before locking the set screws back in place.