The Harris S-BRMP Bipod Leg Notch Picatinny Mount 6" to 9" is most useful for shooting off the bench. This bipod raises bore height from approximately 6 to 9 inches and attaches to a picatinny rail mount.FeaturesExtends from 6" to 9"Direct attachment to a Picatinny Rail onlySwivels (tilts) to compensate for uneven terrainNotched Legs are spring loaded for fast deployment Ultralight weight - 13 ozHas a built-in sling swivel stud to attach the slingMost useful for shooting off the bench