MDT SRS Lite Fixed Skeleton Rifle Stock Black. Length of pull (LOP) can be adjusted and fine-tuned with spacers. Achieving the perfect cheek weld is a breeze simply loosen the set screws and adjust to the desired height before tightening them back down to lock in place. Specifications for MDT SRS Lite Fixed Skeleton Rifle Stock: Manufacturer: MDT Stock/Brace Material: 6061-T6 Aluminum Gun Type: Rifle Package Contents: MDT SRS Lite Fixed Skeleton Rifle Stock MDT 104976-BLK: SRS Lite Fixed Skeleton Rifle Stock Black