As part of the Regional Support Project to the Counter Terrorism Task Force (CTITF), UNREC, with the support of the Economic Community of West African States (ECOWAS), organized an Experts workshop on improving cross-border cooperation in SALW control. The workshop, financed by the United Nations Counter-Terrorism Center (UNCTC), brought together national and international experts on improving cross-border and sub-regional cooperation for control of SALW trafficking in relation to existing regional and sub-regional instruments. Participants exchanged views on the strengths and weaknesses of the legislative and judicial systems in relation to subregional and regional cooperation against the proliferation of SALW. The aim of the workshop was to bring together experts to discuss ways to improve cross-border, sub-regional cooperation in arms control under the UNSC Resolution 2178 (2014).