TacFire&reg; Tactical 7.75"&mdash;11.5" Long Size Folding Adjustable Picatinny Weaver Mount Aluminum Bipod TacFire official product, Weaver / Picatinny Style Aluminum Adjustable Folding Bipod 6 different size of height can be chosen from , adjustable from 7.75"11.5" , 0.75" difference for each level Can be folded underneath when Not In Use , Adjustable legs with retract/collapse button Mount directly to any picatinny / weaver style rail and lock in by by steel screw Weight : 9.8 Oz , Finish : Matte Black , Material : T6 6061 Aluminum