The Bolt Override or "Brass over Bolt" malfunction is one of the worst possible malfunctions which the AR15/M16 weapons platform can experience. In this type of malfunction, an expended cartridge is trapped in the charging handle groove above the bolt head and will not eject when cycling the bolt. To compound the problem, the weapon can not be stripped down as the bolt carrier protrudes into the buffer tube prohibiting disassembly.
This malfunction can only be fixed through direct manipulation of the bolt carrier or 'jarring' the bolt rearwards so the cartridge can fall free. In this video, Jason Falla of Redback One demonstrates the difficulty of completing the bolt override drill while simultaneously being placed under additional combat stress by two advancing Marathon T40 robots.
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