India's Intermediate Ranged, Submarine Launched, Ballistic Missile - The K4 - is a curently deployed Tactical Nuclear weapon (since 2010s Testing and 2020s deployment with The Indian Navy). Exact numbers dployed are unclear (but it is estimated to be around 10). Ranging around 2,500-miles - The K4 weighs 20-tons and is roughly 40-feet in length. Twin-staged and solid fueld, The K4 may also support either a single or multiple Tacticl Nuclear warhead in the 2 to 5-Megaton range. Currently all K4s are supprting the ''Arihant''-Class of Indian Naval Submarines.