The CM-400AKG supersonic
anti-ship missile is a derivative of the
SY-400 guided rocket, also developed by the
China Aerospace Science and Industry Corporation (CASIC). The CM-400AKG is advertised as having a length, a diameter, a mass of , and a range of , It has a high cruise altitude and a steep terminal dive (semi-ballistic flight profile), with a maximum terminal speed of
Mach 4.5 to Mach 5. Seeker options include "INS + GNSS + Passive Radar Seeker," potentially for anti-ship with a circular error probable (CEP) of ., and "INS-GNSS+IR/TV Seeker", with a CEP of . In the aftermath of the
2025 India–Pakistan conflict, Pakistan Air Force officials claimed that CM-400AKG has a range of , a terminal locking range of , a speed of Mach 5, and a passive mode for anti-radiation and
suppression of enemy air defenses (SEAD) missions. ==Operational history ==