The Bull is an armored personnel carrier with a v-shaped hull designed in a combined effort between Ceradyne, Ideal Innovations Inc. (I-3), and Oshkosh Corporation in response to the MRAP II competition.

In 2005 Ideal Innovations' President, Robert Kocher, had worked with the U.S. Army Research Laboratory to find an EFP solution, patented it, and then found Ceradyne as a partner in 2006 to produce an armored cab out of it.

The U.S. Army's Joint Manufacturing and Technology Center at the Rock Island Arsenal provides the EFP-stopping outer layers of the armor.

Team Bull members at Ceradyne, together with almost three dozen employees from I3 and Oshkosh, immediately began working round-the-clock shifts.

[4] After testing the initial two prototypes, the military awarded the partnership a $18.1 million contract to produce six more Bull vehicles of the six person variant by the first quarter of 2008 for further evaluation.