The Shield Arms Mountain 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. Mountain Partisan Sling Features: Two-Stage progressive tension Quick adjust system Easy index thumb loop Solid lock bi-directional adjustment Redundant hardware Abrasion resistant shoulder sheath Kevlar Sling Loop Features: Quick attach No mounting hardware required High temp rated (800-900 degrees Fahrenheit) Reduced sound