A sight apparatus for attachment to a paintball marker having two distinct reticles to assist with the placement accuracy of paintballs. The filter chamber contains a filter cartridge with a hollow core positioned over the discharge opening of a motor plate that closes the filter chamber. Finally, with slice images of the relevant slice areas are produced and displayed. A contact pad that provides no substantial air-bearing support is located at the leading portion and supports or contains the magnetic elements of the readwrite head.