Rheinmetall Denel Munition of South Africa and a unit of South Korea's S&T Holdings Co top the list of defence companies looking to lease land in the Southeast Asian country, said Roger Gamban, chief of the state agency overseeing the country's weapons and munitions output.
US-based Colt's Manufacturing Co and Canada's Waterbury Farrel are also considering manufacturing in the Philippines, he told Reuters.
The move to launch a defence economic zone in the northwest Bataan province by August comes as Manila has become increasingly uneasy about China's assertiveness in the South China Sea.
Under President Benigno Aquino, the Philippine government has embarked on a five-year, 75 billion-pesos ($1.68 billion)modernisation programme to improve its capability to defend its maritime borders.
The South Korean company has firmed up a proposal for a 2billion pesos ($44 million) firearms manufacturing plant in the defence zone, Gamban said. Waterbury plans to set up a2-billion-peso facility in the country, he said.
All four firms did not immediately respond to emails or calls by Reuters.
The Philippines currently produces munitions only for small calibre firearms, and imports all its medium and large calibre ammunitions. By getting foreign firms to produce munitions in the country, the government will cut short its procurement process and create jobs, Gamban said.