Abstract: An adapter for connecting a bipod to a Picatinny rail of a firearm may include a base having upper and lower portions. The upper portion may include a generally planar surface with longitudinal edges. The lower portion may include a cylinder having a through bore. First and second support members may be disposed along the longitudinal edges. The first support member may define a female mating configuration of one side of the Picatinny rail. A locking bar may be detachably connected to the upper portion of the base. The locking bar may have an interior surface. A leaf spring may be fixed to an underside of the upper portion of the base. The interior surface of the locking bar and the second support member may define a female mating configuration of another side of the Picatinny rail.