The US Defence Security Cooperation Agency (DSCA) has notified congress of a $534 million deal for Australia to obtain up to 350 Raytheon AIM-9X Block II Sidewinder missiles.

The prospective deal includes the missiles, 35 AIM-9X speical air training missilles, 95 captive air training missiles, as well as other equipment related to the acquistion, says the DSCA. It also includes technical documents and training.

The weapons will be used aboard Canberra’s Boeing F/A-18 Super Hornet fighters and its future fleet of Lockheed Martin F-35 aircraft.

According to Raytheon’s web site, the developmental AIM-9X Block II “features updated electronics that enable significant enhancements, including lock-on-after-launch capability using a new weapon datalink to support Beyond Visual Range engagements.”