Shield Arms SGPSLNGBLK: The Shield Arms Partisan Sling was designed by former Green Beret and R&D Gremlin Tyler Imig, and brings together his years of experience along with all the best features of slings he\'s used into one superior sling design. Two-Stage progressive tension. Quick adjust system. Easy index thumb loop. Solid lock bi-directional adjustment. Redundant hardware. Abrasion resistant shoulder sheath