Abstract: The bore sighting apparatus or alignment device is comprised of a two-part ring hinged together and provided with a clamp for securing the ring on the muzzle of a howitzer. A pair of hinged witness sights are provided on the ring and a pair of arms extend outwardly from opposite sides of the ring. A vertical arm is hinged on the outer end of each arm with a target and leveling vile being disposed at the top of each vertical arm. A turnbuckle-type device is connected between the upper end of each vertical arm and the horizontal arm for adjusting the vertical arm to a true vertical position. The targets are comprised of a cylinder having a pattern in glass on the viewing end with the opposite end having a smaller opening with a translucent lens to allow the entry of light to illuminate the viewing end. The targets may be sealed and filled with nitrogen to eliminate fogging and a fitting is provided on the rear of the target to accept a collimator lighting source for night bore sighting.