An apparatus for use with a disrupter to disable explosive ordnance and improvised explosive devices is described. In a preferred embodiment, the apparatus comprises a sleeve adapted to be fit around the barrel of the disrupter, wherein the sleeve has an opening of generally circular cross section and an aperture for holding a positioning rod; and a positioning rod connected to the sleeve through the aperture for positioning the disrupter in relation to the explosive ordnance or improvised explosive device. The use of the sleeve and positioning rod combination permits rapid determination of stand-off for the disrupter and the angle of impact of the charge the disrupter will fire. The device is particularly useful in disabling pipe bombs.