The term 'Hired Guns, Briefly' is an abbreviation for the job description of mercenaries, which is MERCS (5 letters). Mercenaries are individuals who are hired to perform military services for a fee. They are often employed by governments or private organizations to provide security, combat, or other services. Mercenaries are not bound by the same laws and regulations as regular military personnel, and they are often used in situations where a country or organization does not have the resources or manpower to fulfill their needs.