Approximately 50 Microsoft personnel so far stated in a petition they “do not want to become war profiteers.” This comes after the software company signed a $480 million contract to provide the U.S. army with HoloLens, an augmented reality system.

After a copy of the petition appeared on Twitter Friday afternoon, a Microsoft employee told the Guardian that it  further states, “We did not sign up to develop weapons, and we demand a say in how our work is used.”

Microsoft’s HoloLens works on the principle of mixed reality, wherein the real world is covered with an artificial layer produced by the headset. Think of the application as somewhere between the ambitious Google Glass and the complete virtual reality (VR) experience of the Oculus Rift. The HoloLens started it out as the doomed Kinect technology, developed for the Xbox gaming console

The intent of HoloLens, according to the letter and many who worked on its initial development, would be “to help architects and engineers build buildings and cars, to help teach people how to perform surgery or play the piano, to push the boundaries of gaming, and to connect with the Mars Rover (RIP).”