Low Spring Loaded Bipod By Barska Hunting range gear bipods Versatile top of the line Another quality product Applicable Firearm: AR-15, M16 picatinny/weaver style rails Spring loaded foldable/ extendable legs with posi-lock wheel and quick retract button as well as rubberized feet for maximum stability Dual mounting- Can be used with either picatinny rail or swivel stud (Picatinny Mount and Swivel Stud Included) Strong and lightweight aluminum construction Adjustable Height: 5.5 Inches- 7 Inches