Patent ID: 7752798
Filing Date: 2010-07-13
Classification: F41G

Abstract:
1. A see-through periscope for sighting-in a firearm having one or more open sights and an optical sight, comprising: (a) a rectangular frame creating a window having a length and a width, the window being a void between an upper inner side of the frame opposite to a lower inner side of the frame in a lengthwise dimension and between two inner sides of the window in widthwise dimension; (b) a top reflector attached at a first angle on the upper inner side of the frame at a top of the window; (c) a bottom reflector attached at a second angle on the lower inner side of the frame at a bottom of the window such that light rays, upon entering the window from a forward direction, reflect from the bottom reflector to the top reflector and emerge in an opposite direction; (d) a removable mount into which the see-through periscope is adjustably mounted, the mount removably affixed to the firearm between the one or more open sights and the optical sight, and the bottom reflector colinear with the one or more open sights; wherein the bottom reflector and the top reflector provide an image of the one or more open sights aimed at a target, and the window allows a unobstructed view of the target through the optical sight.