HAL Tejas is armed with a single Gryazev-Shipunov GSh-23 twin-barreled 23 mm autocannon . It has a rate of fire of 3,400-3,600 rounds/min and uses a 23x115 mm AM-23 ammunition . It is also used by Mig-21 (M, SM, MF, SMT, bis) , Mig-23 variants and other ground attack aircrafts like SOKO J-22...