XM4

XM4 may refer to:

• XM-4 Blues, a satellite operated by XM satellite radio
• XM 4, a radio channel from Sirus XM satellite radio; see List of Sirius XM Radio channels
• South African type XM4 tender, a steam locomotive tender
• Moller XM-4, a VTOL aircraft; see List of aircraft (Mo)
• Lipán XM4, a variant of the Argentine drone Lipán M3; see List of unmanned aerial vehicles
• XM4, a prototype version of the M4 carbine
• XM4 rocket launcher U.S. helicopter armament subsystems