Delivery of the missiles is expected by the end of 2012. The IAF has selected the Derby BVR-AAM over the indigenous Astra BVR-AAM to expedite the induction of Tejas into its arsenal. The Derby BVR-AAM missile is a tried and tested weapon, though it is yet to be successfully test-fired in the air using a Sukhoi-30 MKI fighter jet. The Derby has a range of 50km, compared with 80km of the Astra missile.
Tejas developer Aeronautical Development Agency (ADA) said the Astra BVR-AAM would be integrated with the LCA once all the flight test firing schedules were successfully completed.