The Harris S-25CP Bipod extends from 13 to 27 inches and attaches to a Picatinny rail. It features a three piece smooth leg construction and it swivels and tilts to compensate for uneven terrain. The bipod has a built in sling swivel stud to attach a sling. It is the tallest of the bipods and is useful in the snow and grass. It is ultralight weight at 21.5 oz. It is ideal for the sitting positino and may be better suited for the very tall.