Twod Rifle Bipod 6-9 Inch Adjustable Spring Return Picatinny & Swivel-Stud Sniper Hunting Bipod with Mount Adapter Twod Bipods have adjustable leg length (5 settings) with spring return and deploys quickly with the touch of a button. Attaches to virtually any firearm with a swing swivel stud or picatinny / weaver rail. Twod Bipods have adjusting swivel tilt-level to tilt from side to side for sniper aiming. The soft rubber feet provide stability while the rubber padded base protects the rifle's fore end. The lightweight aluminum design adds minimal weight and deploys quickly, compact and durable.