AMPATUAN, Maguindanao - Four members of the New People's Army laid down arms and surrendered to the 1st Mechanized Infantry Battalion in Barangay Kamasi,Ampatuan, Maguindanao on Thursday, the miltiary today said.The NPA rebels who are members of the Platoon Myphone of Guerilla Front 73 are Ariel Biluwal, 29, Oting Ginta, 21, Michael Malik, 23, and Jane Gintangan, female, 19, old all of Esperanza, Sultan Kudarat.