Edgar Sherman Design ESD Sling, 2-Point Combat Sling, 1, Matte, Flecktarn, 20+ Inches of Adjustment, Mounting Hardware Not Included ESD-SL-FLEK The Edgar Sherman Design Sling" ESD Sling" was designed with purpose" research" extreme testing" and a collection of user experiences. The ESD Sling is adaptable to the end user. The ESD Sling is highly customizable to any rifle" sub-gun" shotgun" hunting rifle" bolt action" and PDW weapon system. The ESD Sling features an elastic regulator that allows the sling to stow against the side of your rifle.