Abstract: A portable support assembly includes a central generally elongated panel piece flanked at both sides by lateral panel pieces which extend adjacent a portion of the central piece. Both the central piece and the two flanking pieces include a transverse slot for receiving an insert extending across the panel assembly. The lower common surfaces of the panels are slotted with three recesses, the first extending longitudinally from the front into the central piece and the other two aligned diagonally towards each other from the rear corners of the lateral pieces and into the central piece. Legs are then inserted into each recess to provide the support for the assembly and also to interlock the flanking pieces together to the center piece. One leg includes a mount for an adjustable front firearm support while a shaped transverse recess in the center piece receives a slide deploying an adjustable rear firearm support.