Harris bipod for sale as described below (LNIW)
Model BR: (Bench Rest) Lowest of the Bipods. Most useful for shooting off the bench. Adjustable height from 6" to 9".
Series "S": Rotates to either side for instant leveling on uneven ground. Hinged base has tension adjustment and buffer springs to eliminate tremor or looseness. They are otherwise similar to non-rotating Series.
usually retails for $85 and up