The CM-400 is a family of Chinese supersonic air-launched missiles that includes anti-ship missile and anti-radiation missile variants manufactured by China Aerospace Science and Industry Corporation (CASIC).
The CM-400AKG was unveiled at the 2012 China International Aviation & Aerospace Exhibition, where it was claimed to have entered service on Pakistan Air Force CAC/PAC JF-17 Thunders. At the 2013 Dubai Airshow, a Pakistani military source claimed the missile was in Chinese service, and that an anti-ship version was in development. In 2014, a PAF JF-17 was spotted carrying two â possibly mock-up â CM-400AKGs, suggesting the missile was still in development.
At the 2013 Paris Air Show, Fábrica Argentina de Aviones officials revealed the missile's performance was a major reason for their interest in co-producing the JF-17.
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 , and capable of carrying either a blast warhead or a penetrator warhead. 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 . Pakistan air force officials described the missile as "an aircraft carrier killer."
In the aftermath of the 2025 IndiaâÂÂPakistan 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.
The Pakistan Air Force (PAF) reportedly purchased 60 CM-400AKG missiles from China in 2017 and 2018.
The CM-400AKG saw its first-ever live combat use during the 2025 IndiaâÂÂPakistan conflict, when the PAF used the missiles to target an Indian S-400 air defense system.
According to the Indian Air Force, at least 60 such missiles were fired towards the S-400 complex at Adampur airbase over the course of four days. The PAF attempted varying profiles, with the missiles flying at speeds ranging from Mach 3.3 to Mach 5, but none were able to find their mark. Pakistan has been unable to present any evidence, whether satellite imagery or otherwise, even from third parties, to substantiate their claims.
In March 2026, images were published online showing the integration of the CM-400 onto Serbian Air Force and Air Defence MiG-29s.