According to various aspects, exemplary embodiments are disclosed of a two-piece metallic board level shield (BLS). In an exemplary embodiment, the BLS is solderable to a printed circuit board (PCB). The BLS includes a lid or cover and a fence or frame. The lid and fence are complementary in shape. The lid may be mounted onto the fence via a locking mechanism in a first position and a compressed second position, where the locking mechanism provides resistance against internal upward forces when the BLS has been compressed into a second position. The BLS may be soldered to the PCB while in the first position, and subsequently compressed into the second position after the solder has hardened.