XM8

The XM8 is a lightweight assault rifle system from the late 1990s to early 2000s. The rifle was designed by German small arms manufacturer Heckler & Koch (H&K), and shares design and engineering with their G36 rifle.

The XM8 design was originally part of the Objective Individual Combat Weapon program (OICW), which was developing a "smart" grenade launcher system with an underslung carbine rifle. The system was unable to meet performance and weight requirements and was eventually canceled. In the aftermath, the two portions of the OICW were separated, resulting in the XM8 and XM25 projects.

While the XM8 was being considered by the United States Army as a potential standard infantry rifle, this project was put on hold in April 2005, and was formally canceled on October 31 of that year.

The weapon was adopted by the Royal Malaysian Navy for its PASKAL special forces.