Firearm aiming device

1. A rear-sight aiming device to aid a shooter of a firearm, the firearm having a barrel, and a front aiming sight, the rear-sight aiming device comprising:

an elongated housing having a tunnel therein, the tunnel being configured so it is parallely arrangeable with the firearm's barrel and alignable with the front aiming sight and having at least one light admitting opening to the tunnel;

an elongated optical fiber having a front end and a rear end, the optical fiber being disposed inboard within the tunnel whereby at least a portion of the optical fiber is operably associated with the at least one light admitting opening, and the elongated fiber is in a non-linear configuration;

an annular light-transmitting cylinder, with a front annular surface and a rear annular surface, being open at both ends thereof and having an outer diameter and an inner diameter, the translucent annular light-transmitting cylinder being disposed within the tunnel between the optical fiber and the shooter of the firearm during shooting;

a self-activating light source having a front end and a rear end, the self-activating light source being disposed coaxially within the annular light-transmitting cylinder, whereby the self-activating light source is proximal the shooter of the firearm during shooting of the firearm;

a lens disposed adjacent to the elongated optical fiber and disposed intermediate the elongated optical fiber and the self-activating light source; and

an attachment mechanism configured to attach the aiming device to the firearm,

whereby the firearm can be aimed in a light or dark environment by aligning, with the front aiming sight of the firearm, the self-activating light source or the annular light-transmitting cylinder, which provides the shooter of the firearm with an illuminated dot by the self-activating light source or by an illuminated annular surface produced by the optical fiber, as transmitted through the light-transmitting cylinder.

2. The aiming device of claim 1 , wherein the optical fiber has a diameter smaller than the inner diameter of the annular light-transmitting cylinder.

3. The aiming device of claim 1 , wherein the non-linear configuration is a serpentine configuration.

4. The aiming device of claim 1 , wherein the non-linear configuration is a spiral configuration.

5. The aiming device of claim 1 , wherein the optical fiber has a flared front end.

6. The aiming device of claim 1 , wherein the light transmitting cylinder has a shoulder adjacent the front annular surface thereof configured to help retain the self-activating light source within the light-transmitting cylinder.

7. The aiming device of claim 6 , wherein the shoulder is annular.

8. The aiming device of claim 1 , wherein the lens is a spherical lens.

9. The aiming device of claim 8 , wherein the lens has a diameter equal to the outer diameter of the light-transmitting cylinder.

10. The aiming device of claim 1 , wherein the optical fiber has a diameter smaller than that of the self-activating light source.

11. The aiming device of claim 1 , wherein the self-activating light source is completely housed within the annular light transmitting cylinder.