Firearm sight with modular interchangeable hoods

1. A sighting device configured to be mounted on a firearm, the device comprising:

a core unit that includes a source of electrical power, the core unit configured for attachment to a rail on the firearm;

a hood removably secured to the core unit and enclosing a portion of the core unit and at least partially defining a sight window through the hood; and

an electrical connection between the core unit and the hood, wherein electrical power is transmitted between the core unit and the hood.

2. The sighting device of claim 1 , wherein the device is a reflex sight.

3. The sighting device of claim 1 , wherein the hood includes an electrical accessory carried by the hood.

4. The sighting device of 3 , wherein the electrical accessory is one of:

a solar charging cell;

a laser pointer sighting device powered by the core unit; and

a laser range-finding device powered by the core unit.

5. The sighting device of claim 3 , wherein the electrical connection between the core unit and hood is electro-mechanical and the electric power is conducted between the core unit and hood.

6. A sighting device configured to be mounted on a firearm, the device comprising:

a core unit including an electrical power supply and a clamp for removably securing the core unit to a rail on the firearm;

a hood removably secured to the core unit and at least partially defining a sight window through the hood;

an electrical accessory carried by the hood; and

a connection between the core unit and the hood, wherein electrical power is transmitted between the core unit and the hood.

7. The sighting device of claim 6 , wherein the electrical accessory is one of:

a solar charging cell;

a laser pointer sighting device powered by the core unit; and

a laser range-finding device powered by the core unit.

8. The sighting device of claim 6 , wherein the connection comprises:

at least one slot formed in the core unit;

at least one projection formed in the hood and configured to register and engage with the slot in the core unit upon assembly together; and

an electrical contact in each slot and on each projection, wherein upon assembly together, and electrically conductive circuit is established between the electrical power supply and the electrical accessory.

9. The sighting device of claim 6 , wherein the device is a reflex sight.

10. A sighting device configured to be mounted on a firearm, the device comprising:

a core unit including a clamp for securing the core unit to a rail on the firearm;

a hood removably secured to the core unit and at least partially defining a sight window through the hood;

at least one slot formed in the core unit; and

at least one projection formed in the hood and configured to register and engage with the slot in the core unit upon assembly together.

11. The sighting device of claim 10 , further comprising:

an electrical power source in the core unit;

an electrical accessory carried by the hood; and

a connection between the core unit and the hood, wherein electrical power is transmitted between the electrical power source in the core unit and the hood.

12. The sighting device of claim 11 , wherein the electrical accessory is one of:

a solar charging cell;

a laser pointer sighting device powered by the core unit; and

a laser range-finding device powered by the core unit.

13. The sighting device of claim 11 , further comprising:

an electrical contact in each slot and on each projection, wherein upon assembly together, and electrically conductive circuit is established between the electrical power supply and the electrical accessory.

14. The sighting device of claim 10 , wherein the device is a reflex sight.

15. The sighting device of claim 10 , further comprising ball detents between each slot and projection.