Zeadio ZBP-F11A4 6" - 9" Adjustable Spring Loaded Rifle Bipod with 3 Adapters [1 Year Warranty] Brand: Zeadio. Model: ZBP-F11A4. Come with: 1 x Hand guard adaptor, 1 x Universal barrel mount adapter, 1 x Picatinny/Weaver Rail adaptor with sling stud. Easy attachment. Designed for fixed stud mount. High-tech durable aluminum construction and steel top platform. Extendable Legs: Length of both legs can be adjusted for best position. Includes a one-year manufacturer Zeadio.com's warranty against defects in materials and workmanship.