The Indian Navy is receiving the K series of submarine-launched ballistic missiles (SLBMs). The state-run Defense Research and Development Organisation (DRDO) is leading this programme. The K-5 can deliver a nuclear warhead out to a distance of 5,000 km. This missile will undergo a series of developmental trials before its induction. Other members of the K series are the 750-km range K-15 (B-05) Sagarika and 3,500-km range K-4. These systems have already been test-fired several times. The K-15 is the SLBM version of the land-based Shaurya missile. The K-15 missile is integrated with the INS Arihant class submarine. INS Arihant will receive the K-4 in the near future.