Abstract: Firearm supporting devices (e.g., firearm vises), methods of assembling firearm supporting devices, and methods of packaging firearm supporting devices are disclosed herein. One aspect is directed to a firearm supporting device for supporting a firearm having a first section and a second section spaced apart from the first section. In one such embodiment, a firearm supporting device includes a base, a first support for carrying the first section of the firearm, and a second support for carrying the second section of the firearm. The base includes a first portion and a second portion configured to be attached to the first portion. The first portion is fixed relative to the second portion when the first and second portions are attached. The first support is configured to project from the first portion of the base. The second support is configured to project from the second portion of the base.