The MK.46 light machine gun is a derivative of the M249 SAW, having undergone a weight reduction program for the U.S. SOCOM(Special Operations COMand). Several components, including the carry handle and vehicle mount have been removed. In addition, a lightweight barrel was installed along with picatinny rails to allow the fitment of tactical accessories such as lights and laser sights. The MK.46 functions the same as the M249 using the same controls and 5.56x45mm ammunition.