Military parts are a specified set of parts in the Custom Robo series. They are similar to illegal parts, in the aspect that they have a high power output. They were introduced in Custom Robo GX. Their statistics are abnormally high, and they possess heightened capabilities. As with illegal parts, renegade commanders buy and sell them in the black market. In many instances, the use of "illegal" parts will refer to both illegal and military parts. There are very few military parts. Only Military Commanders are technically qualified to use them.