Globally, sovereign countries are faced with intensed and frequent internal security threats usually shaped by history, experiences and socio-political realities. Nigeria is faced with rising tide of internal security turbulences which has considerably threatened its existence' as well as the country's security sector governance. The insecurity narratives have labelled Nigeria as a dreaded insecurity flash points on the planet and questioned it's capacity to guarantee economic investment opportunities. The country has so far recorded security problems, ranging from ethno-religious and seperatists agitations, high profile terrorism and insurgency, violent civil strife, drugs cartel violence, intercommunal violence, national boarder skirmishes, illegal oil bunkering and sea piracy etc. The unbearable nature and extent of the issue demands for urgent and sustainable panacea. The country has presented a military reserve force vacuum, as there is no such frame work in place to augment the current military apparatus during emergencies. This obvious shortfall has generated curiosity and debate among scholars, security sector reformers and defence policy formulators. The paper dwells on eligible literatures on the imperativeness of establishing a robust military reserve force for Nigeria to help narrow the existing gap between the country's overwhelming security threats and it's questionable military capabilities. Premised on reviewed eligible literatures, the paper revealed inadequate economic, social and political will as impediments against establishing military reserve framework. The paper explored abundance in human and natural resources as opportunities for establishing sustainable military reserve force for the country. The mechanism shall also create employment opportunities for the burlging, unemployed and restive youth in the country. Securitization Theory is employed as tool of analysis. Related literatures on the subject matter have shown that most developed and developing nations across the world have successfully established military reserve forces as strategic internal security frameworks, but same cannot be said of Nigeria, despite the plethora of its security threats, and enormity in human and material assets in the land. Premised on overwhelming evidences, the paper recommends policy reforms in security sector governance to allow a military reserve force to evolve and contain spiralling trend of internal security threats in the country, in line with global based practices.