RioRand 6" to 9" Hunting Rifle Bipod Adjustable Spring Return Sniper Sling Swivel Mount Material: Hardened and aluminum; Leg Height: 6" (retracted) 9"(fully extended) Light weight : 360g Durable with new design high quality that you can quickly attaches to sling swivel stud. Features:Ultra light spring loaded folding mechanism bipod; Compact and light weight;Non-rust black anodized finish; Rubber padded on top to protect forend of the rifle gun. Bipod model allows shooter to compensate for ground that is unlevel by up to 20 degrees. A Rail Adapter is required for mounting on a Picatinny / weaver rail.