Abstract: A sight installation device, comprising a body having a notch which is capable of receiving a pistol slide with a sight receiving groove, the notch possessing a first and a second lateral sidewall, and an at least one horizontal brace abutment. The sight installation device's body also has at least one guide channel proximate the notch, in which a pusher bit is longitudinally slidable and configured so as to contact a sight element directly in line with the pistol slide's sight-receiving groove. The sight installation device also possesses a drive screw configured to engage an opening in the body proximate the guide channel, the drive screw engaging the opening and configured to engage the pusher bit.