A hardcore Naxalite carrying a reward of Rs 5 lakh on his head surrendered before Narayanpur police in southern Chhattisgarh on Tuesday, an official said. Motu Ram Mandavi alias Manoj Mandavi, the commander of the Naxal local organisational squad (LOS), surrendered before Narayanpur Superintendent of Police (SP) Pushkar Sharma, he said.