TacFire&reg; Tactical 6.25"-8.5" Short Size Folding Adjustable Picatinny Weaver Mount Aluminum Bipod TacFire official product, Weaver / Picatinny Style Aluminum Adjustable Folding Bipod 4 different sizes of height can be chosen from , adjustable from 6.25"-8.5" , 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 : 8.5 Oz , Finish : Matte Black , Material : T6 6061 Aluminum