sentences:  The successor system, dubbed 'Samolet-M' (and more recently A-235) will employ a new, conventional, variant of the 53T6 missile to be deployed in the former 51T6 silos.The new PRS-1M is a modernized variant of the PRS-1 (53T6) and can use nuclear or conventional warheads.It can hit targets at ranges of 350 km and altitudes of 50 km.