Abstract: A firearms target support structure is formed of a set of interengaging steel units, that are readily assembled/disassembled for ease of transport and deployment. The target support structure comprises a base unit and an upright and target stop plate unit, each of which is preferably made of steel angle irons, prescribed portions of which engage one another. The base unit is comprised of a pair of steel angle irons legs that are bridged by a flat mounting plate opposite ends of which are welded to the angle irons. On the flat mounting plate a pair of spaced apart sections of steel angle iron extend vertically for receiving an upright support steel angle iron leg therebetween, so that one end of the upright angle iron support leg rests on the flat mounting plate. A short section of steel angle iron is affixed to the other end of the upright support leg and extends laterally of the leg to provide a mounting base for a steel circular target.