His comments came in the wake of former Defence Minister A K Antony's statement that lobbies were working towards allowing 100 per cent and this was against national interest after the announcement was made in the General Budget.
"Many people have raised their concerns after the FDI in defence sector has been increased from 26 per cent to 49 per cent... FDI will help eliminate the unnecessary role of middlemen and as a result, the scope of corruption will reduce," Singh said on his Facebook page.
He said despite the increase in FDI, the ownership stays with the Indian companies.
"Three years back, we surpassed China as the world's leading importer of weapons and have retained the distinction since then. We import 70 per cent of our armament needs. China which also stands at the second position in terms of import expenditure in defence sector is performing remarkably well by developing indigenous defense technology and trying to become self-sufficient," he said.
Singh said India was still dependent on its public sector units and "only 15 per cent of our equipment is state of the art and about 50 per cent face obsolescence".