The ML04 Milo is a younger offshoot of the ML03, which features a refined front compared to its predecessor. It is now covered by a stylish aluminum flap, concealing the ODD slot, ports, and power button. The power button can also be operated with the flap closed, but there is an option to block it, allowing the button to respond only when the flap is open – a feature that is likely to appeal to new parents and pet owners. Additionally, there is the option to dim the brightness of the power LED through the front flap to avoid being blinded during evening movie enjoyment. The two USB 3.0 ports located at the lower front (internal connection) are flanked by two audio jacks.

Despite its overall flat and compact design, Silverstone has incorporated a fairly powerful ventilation system. The unit comes with various mesh grids that can be expanded around active components. Up to four 80mm fans can be mounted side by side on the right side. The interior accommodates Micro-ATX, Mini-ITX, or DTX motherboards. The power supply is mounted horizontally beside it and can draw fresh air through its own bottom opening. There are comparatively many slots available for drives. The three internal 2.5-inch slots can even be expanded by two if no optical drive is used.