End of the Cold War had contributed to the plentitude of firearms within the Southeast Asia region which led to the increase of small arms and light weapon (SALW) smuggling activity. For decades till today, most countries in this region continue to face internal armed conflicts. Malaysia strategic location, situated at the world’s busiest sea lane trades had resulted in rampant cross border crime of SALW smuggling activities. Malaysia’s strict firearms law disallows the possession of SALW without a license. In spite of such strict SALW legislations, these smugglings continues. What are the factors that contribute to the increase of SALW smuggling into Malaysia? The main objective of this article is to scrutinise the external factors that promote the increase of SALW smuggling into Malaysia. This study employs a qualitative method with primary data obtained through preliminary and formal interviews with Malaysian and Thailand security agencies, crime desk journalist, non-governmental organizations, smugglers, former separatist member, former Thai residents, informers and prisoners of SALW related. Whilst secondary data was acquired via credible research. The study found that the national factors and non-national factors have influenced the increase of SALW smuggling into Malaysia.