This is an option that can be added to any Kelley tang sight or staff. It must be ordered in addition to the sight/staff. Markings cannot be added to an existing sight/staff. The cost is in addition to the cost of the actual sight/staff and will be made upon ordering as this is not usually a stocked item. This is a handy option for left handed shooters. Kelley Soule Sights' advanced construction makes them stand out in their design and function, such as all parts are machined from solid stock to precise tolerances.
Be sure you are ordering the correct sight for your rifle. There are absolutely no returns on sights that have been mounted.