An explosively propelled piston assembly (EPPA) comprising an optional mounting plate; at least one lower cylinder fastener; a breach bolt with a base and an upward extending member; a breach plate having a plurality of surround openings; a breach gasket having a plurality of openings; a combustion piston with a base, a center opening, and upward extending side wall and a threaded opening; a piston dampening ring; a combustion cylinder having an upper section, a lower section, upward extending members and at least one ventilation bore; and a plurality of threaded plate fasteners. Once the EPPA is assembled, an explosive charge is placed into the EPPA. The charge is then activated which produces a contained explosive force that actuates the piston, causing the piston to extend outward, applying the force onto an object in contact with or adjacent to the EPPA. The force can be used to produce pushing, flipping, rolling or other movement of the object.