Harris Engineering Bipod, Rotating, 9-13 Leg Notch, Black S-LM Harris Engineering's Ultra-Light 9"-13" Swivel/Notched Legs Sling Swivel Bipod is manufactured using high quality parts to ensure excellent function and sustainable use. It attaches to a Sling Swivel Stud. Carrying your rifle with a sling or shooting off-hand is not impeded by the use of a Harris Bipod. Hinged bases have tension adjustment to eliminate tremor or looseness in the crotch area of the bipod. Bipods have an all-weather black anodized finish.