The XM8 is a developmental United States military project name and designation for a lightweight and reliable assault rifle system that was under full scale development by the U.S. Army from the late 1990s through the early 2000s.
The United States Army worked extensively with the small arms manufacturer Heckler & Koch (H&K) to produce and develop the system to its requirements following the developments of the OICW contract, throughout which H&K had been a subcontractor to ATK. The XM8 project was entered into with high hopes as the assault rifle was to become the U.S. Army's new standard issue infantry rifle. The project however was put on hold in mid 2005 and eventually formally canceled on October 31, 2005.
The company, General Dynamics came into the project during the latter stages and H&K announced plans to manufacture and produce the XM8 at a plant in Georgia. At the beginning of the project, H&K was British owned however was later purchased back by a group of German investors. Engineering work on the XM8 assault rifle was performed at facilities in the Germany and the United States.