Abstract: In combination with a hand-held firearm comprising a barrel having a longitudinal axis and a muzzle disposed at a distal end of the barrel, the improvement including a secondary viewing device with a housing coupled to the barrel of the firearm and having a first camera retained by, and disposed on a first side of, the housing of the secondary viewing device, disposed substantially adjacent to the muzzle of the firearm, and directed in a viewing orientation substantially orthogonal to the longitudinal axis of the barrel of the firearm for viewing targets lateral to the firearm, the secondary viewing device and the firearm operably configured to have simultaneous and omnidirectional rotation with one another by a user.