Battery compartment for sighting device

1. A battery powered accessory for mounting to a gun, comprising:

a base portion structured to be mounted to the gun;

a battery powered accessory; and

a battery receiver structured to contain a battery for the battery powered accessory, the battery receiver having a closed position in which the battery receiver is contained within the base portion by a retainer pin assembly including a retainer pin and retainer pin spring, and the battery receiver having an open position in which the battery receiver is at least partially separated from the base portion; and

a manually operated release button that, when pressed, moves the retainer pin to cause the battery receiver to be released from the closed position.

2. The accessory according to claim 1 , in which the retainer pin assembly further comprises a retaining screw.

3. The accessory according to claim 2 , in which the retainer pin assembly is mechanically retained by the retaining screw within a void disposed within the battery receiver.

4. The accessory according to claim 1 , in which, in the closed position, the retainer pin mechanically interferes with an edge or lip of the base portion.

5. The accessory according to claim 4 , in which the mechanical interference prevents the battery receiver from separating from the base portion.

6. The accessory according to claim 5 , in which a distal end of the release button is structured to contact the retainer pin.

7. The accessory according to claim 6 , in which pressure applied to the release button causes the retaining pin to translate past the edge or lip of the base portion and eliminate the mechanical interference between the retainer pin and the base portion.

8. The accessory according to claim 4 , in which the lip of the base portion has an angled or beveled surface.

9. A battery powered reflex sight for mounting to a gun, comprising:

a base portion structured to be mounted to the gun;

a reflecting surface coupled to the base portion;

a battery powered target emitter structured to generate a target light and project the target light on the reflecting surface; and

a battery tray structured to contain a battery for the reflex sight, the battery tray having a closed position in which the battery tray is contained within the base portion by a retainer pin assembly including a retainer pin and retainer pin spring, and the battery tray having an open position in which the battery tray is at least partially separated from the base portion; and

a manually operated release button that, when pressed, moves the retainer pin to cause the battery tray to be released from the closed position.

10. The reflex sight according to claim 9 , in which the retainer pin assembly further comprises a retaining screw.

11. The reflex sight according to claim 10 , in which the retainer pin assembly is mechanically retained by the retaining screw within a void disposed within the battery tray.

12. The reflex sight according to claim 9 , in which, in the closed position, the retainer pin mechanically interferes with an edge or lip of the base portion.

13. The reflex sight according to claim 12 , in which the mechanical interference prevents the battery tray from separating from the base portion.

14. The reflex sight according to claim 13 , in which a distal end of the release button is structured to contact the retainer pin.

15. The reflex sight according to claim 14 , in which pressure applied to the release button causes the retaining pin to translate past the edge or lip of the base portion and eliminate the mechanical interference between the retainer pin and the edge or lip of the base portion.

16. The reflex sight according to claim 12 , in which the lipped portion of the base portion has an angled or beveled surface.