I bought a 27'' Harris Bipod at a gun show about 25 years ago. It did not have a swivel head. (I was not well educated about bipods at the time.) I learned the hard way how important a swivel was when I went to shoot at a monster muley across a canyon on a side hill. By the time I got done dicking around with the legs on the hill side to level up my cross hairs for the shot the deer moved on and out of sight for ever. Live and learn.