Arms and related materials embargo is a type of sanction that prohibits the supply, sale, transfer, or export of arms and related materials to a targeted country, entity, or individual. This type of sanction is most likely to be used in order to avoid escalating violent conflicts and/or proliferation of weapons, as it aims to reduce the availability and access of weapons and ammunition that could fuel violence and instability. Arms and related materials embargo can also prevent the transfer of weapons of mass destruction and their delivery systems to non-state actors or rogue states. According to the UN, arms and related materials embargo is one of the most common and effective forms of sanctions that the Security Council imposes to address threats to international peace and security12.
Reference:
1: Different types of sanctions - Consilium1
2: UN Sanctions and the Prevention of Conflict - United Nations University2