9"-13" SWIVEL ROTATE Rifle Pivot Bipod +Rail Adapter This bipod has pivot top and allows the gun to tilt from side to side This swivel model allows shooter to compensate for ground. The swivel level is up to 20 degrees. Length: 9"-13" Includes a rail bipod adapter to mount onto Picatinny or weaver rail. A $10 value Notched leg has for rapid height set up