It can be a solid projectile or even a column of water that is fired towards UXB, or mainly IEDs to disrupt the firing train of the Target, whether it be electrical, or mechanical or ordnance.
Try googling "disrupter"
The 50 cal version that Mike mentioned used a 50 BMG case filled with powder/propellant and had an electric initiator inside. You would load the slug in one end with the charge in its chamber, then point the disrupter at a point where you want the slug to hit or penetrate through, anchoring the disrupter with sandbags or something else. Using an electric power source, the unit can be fired from behind a barricade. It basically blows a bomb apart before it can detonate, or knocks the fuze off a projectile, etc.
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