Nano Reinforced Metal Matrix Composites (NRMMCs) combine the strength and stiffness of metals with the exceptional properties of nanoscale reinforcements, such as nanoparticles or nanofibers. This chapter will inquire into the world of nano reinforced MMCs, exploring their properties, manufacturing techniques, characterization methods, and potential applications. Furthermore, it will discuss the challenges and limitations associated with their development, providing valuable insights into the future prospects of these innovative materials.