moving and accidentally firing the breaker 2 the breaker 2 may be mounted by means on top of an ejection seat 52 and can also be attached to the arms of the ejection seat 52 in operation the ejection seat 52 is deployed sending the seat 52 and breaker 2 toward a canopy 54 the canopy 54 being transparent and typically made of a material such as acrylic the cutter portion 12 engages the canopy 54 the upward thrust of the seat and the reactant force of the canopy 54 shears the pin 50 allowing the piston 10 to move relative to the housing 4 see fig2 the continuing movement of the seat 52 presses the cutter portion 12 into the housing 4 until the apertures 18 align with the balls 38 the spring 34 is compressed and the balls 38 are pushed into the apertures 18 by the oblique outer seat 36 through the force of the spring 34 the cup 28 is released from the housing 4 allowing the breech 21 and cartridge 24 to move in a direction toward the firing pin 46 the kinetic energy of the compressed spring 34 forces the cartridge 24 into the firing pin 46 detonating the cartridge 24 which fires the slug 26 into the cutter portion 12 see fig3 the force of the slug 26 causes the piston 10 to move in a direction toward the canopy 54 the energy of the slug 26 and the expanding high pressure gas 56 of the cartridge 24 drives the cutter portion 12 through canopy 54 the cutter portion 12 penetration of the canopy 54 allows the seat 52.