The present invention is directed to a tactical accessory mount and aiming system, which may be magnetically secured to the slide of a pistol. The tactical accessory mount may have a longitudinal axis. The tactical accessory mount further may include a first wall substantially aligned with the longitudinal axis, a second wall spaced from the first wall, and a third wall disposed between the first and second walls. The third wall may include an inner surface with a first opening and a magnet disposed in the first opening. The inner surface and magnet may form a substantially planar surface. The first, second and third walls may form a three sided compartment which is configured and dimensioned to be slidably received on a pistol slide. The substantially planar surface may be positioned to magnetically adhere to the pistol slide and secure the tactical accessory mount to the pistol slide.