US Patent 8151508 Rifle scope alignment device

A rifle scope alignment device includes a telescopic sight and a mount to position and align a crosshair reticule in a repeatable manner. The device includes a mounting rail, a pair of clamping brackets, and a scope. The mounting rail is coupled to a barrel of a firearm, preferably a rifle, and provides attachment of the clamping brackets. At least one lower clamping bracket has a spring-loaded ball bearing designed to engage a corresponding slot machined into an exterior of the scope. This interaction establishes an accurate and repeatable alignment of the scope and an internal crosshair reticule.