This Tactical Sniper Rifle Bipod features a quick release Picatinny/Weaver style mount and spring loaded notched legs. The ncstar rifle bipod mounts onto most weaver and picatinny rails found on AR-15 rifles and hunting rifles. Bipods head has a ball swivel joint for making precision small aiming adjustments without picking up the bipod off the ground. Push buttons on each bipod leg can lock into any one of the notches for extending or collapsing the legs at the desired height Bipod legs can be folded together and moved into a horizontal rest position Non-Slip Rubber Feet for Stability Height: 8.25" Collapsed Height: 11.0 Fully Extended. Limited Lifetime warranty.