An exemplary embodiment of the tool comprises an elongated shaft having a longitudinal axis and a first portion with a first end and a second portion with a second end, the second portion having an elongated aperture or slot. The tool includes a pull line attachment assembly coupled to the elongated shaft, the pull line attachment assembly being configured to couple to a pull line or strap. The tool also provides a self-orienting pull arm pivotally coupled within the elongated shaft and being configured to automatically latch and be concealed within said elongated shaft. The pull arm is configured to automatically orient to a deployed state under a force of gravity after the elongated shaft has been inserted through a barrier. The pull arm, when in the deployed state, is configured to apply pressure to the barrier to breach the barrier. Methods are described for using the tool to breach a barrier or ballistic material of an enclosed chamber.