The Multi-Object Spectrograph is considered a jack of all trades, optimized for detailed observations of multiple faint objects in deep space over a wide field of view. It is perfect for studying galaxy evolution, the intergalactic medium (IGM), the birth and death of stars, gravitational waves, and taking redshift surveys. The Multi-Object Spectrograph has red and blue channels and is capable of operating in natural seeing during early operations, with increased sensitivity from Ground Layer Adaptive Optics. The instrument will also be the second science instrument installed on the Giant Magellan Telescope.