Replaces factory Buck Mark sight rail to mount the solar/battery powered HOLO-SUN HS503C sight for a low down rock solid platform. This is a great sight set up for the elite Buck Mark owner. Machined from aluminum and cerakoted black or custom colors. Sight not included, but may be purchased here. https://www.tandemkross.com/HOLOSUN-HS503C-Circle-Dot-Sight_p_207.html