AVAWO Hunting Tactical Rifle Bipod with Picatinny and Swivel Stud Mounts MaterialHardened steel, aluminum;ColorBlackLeg Height 6" / 152mm (retracted)  9" / 225 mm (fully extended Light weight : 10ozs 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 gun Durable with new design high quality that you can quickly attaches to sling swivel stud. Pivot model allows shooter to compensate for ground that is unlevel by up to 20 degrees. [Upgraded]Clever dual mounting - Picatinny mount and swivel stud mount.