HAL Tejas: IAF MiG-21s are to be replaced by domestically built HAL Tejas.[149][150] The first Tejas IAF unit, No. 45 Squadron IAF Flying Daggers, was formed on 1 July 2016, followed by No. 18 Squadron IAF "Flying Bullets" on 27 May 2020.[151] Initially stationed at Bangalore, the first squadron was then to be transferred to its home base in Sulur, Tamil Nadu.[152] In February 2021, the Indian Air Force ordered 83 Tejas, including 40 Mark 1, 73 single-seat Mark 1As and 10 two-seat Mark 1 trainers.[153] Total 123 ordered.[154] SEPECAT Jaguar: the Jaguar, known as the Shamsher, serves as the IAF's primary ground attack force.[155] The IAF currently operates 139 Jaguars.[156] The first batch of DARIN-1 Jaguars are now going through a DARIN-3 upgrade being equipped with EL/M-2052 AESA radars, and an improved jamming suite plus new avionics.