Single shotgun shell mounting device

1. An auxiliary ammunition mounting device for holding a single round of ammunition comprising:

a body having an external mounting surface joined to an arcuate portion and provided with a track adapted to slidably receive a rail attached to a firearm, and an internal ammunition receiving and engaging structure sized and shaped to removably receive and retain the single round of ammunition,

wherein the internal ammunition receiving and engaging structure includes a rounded ammunition receiving surface that extends completely through the body and a channel portion spaced from the arcuate portion and formed with an aperture that opens into the track and is configured to receive a fastener that is adapted to be secured to the rail, and wherein the aperture is aligned with a hole formed through the arcuate portion and adapted to provide access to a tool engageable with the fastener.

2. The mounting device of claim 1 , wherein the track has a longitudinal mounting axis oriented in a direction transverse to a central and longitudinal axis of the ammunition receiving and engaging structure.

3. The mounting device of claim 1 , wherein the external mounting surface includes a slot spaced from the track for receiving and holding a resilient retaining element that is frictionally engageable with the single round of ammunition, and forms part of the ammunition receiving and engaging structure.

4. The mounting device of claim 1 , wherein the resilient retaining element projects inwardly from and extends at least partially around the ammunition receiving surface.

5. The mounting device of claim 1 , wherein the channel portion lies between the rounded ammunition receiving surface and the external mounting surface, and has a width smaller than a diameter of the rounded ammunition receiving surface.

6. A shotgun mountable shell holder for holding a single shotgun shell therein comprising:

a rigid body having an external mounting surface joined to an arcuate portion and provided with a track slidably mounted and frictionally retained on a rail arrangement having at least one rail attached externally of a shotgun, and an internal shell receiving and engaging structure having a rounded shell receiving surface that extends completely through the body and is sized and shaped to slidably receive and frictionally retain the single shotgun shell therein,

wherein the track and the rail have mating dovetail-shaped cross sections, and

wherein the internal shell receiving and engaging structure includes a channel portion spaced from the arcuate portion and formed with an aperture that opens into the track and is configured to receive a fastener that is secured to the rail, wherein the aperture is aligned with a hole formed through the arcuate portion and adapted to provide access to a tool engageable with the fastener, and wherein the channel portion has a width which is smaller than a diameter of the rounded shell receiving surface.

7. The shell holder of claim 6 , wherein the track is mounted on a rail attached externally of a receiver of the shotgun.

8. The shell holder of claim 6 , wherein the body has an outer surface that includes a pair of spaced apart open end faces interconnected by the arcuate portion having a pair of sidewalls depending from opposite sides of the arcuate portion.

9. The shell holder of claim 8 , wherein the external mounting surface joins the end faces and the sidewalls, and is engageable against a rail mounting surface to which the rail is secured.

10. The shell holder of claim 8 , wherein the track is formed by a notch that extends continuously along the external mounting surface and opens through the sidewalls.

11. The shell holder of claim 8 , wherein a slot opens through the external mounting surface between one of the end faces and the track for receiving and retaining a resilient retaining element that is frictionally engageable with an outer wall of the shotgun shell and forms pail of the shell receiving and engaging structure.

12. The shell holder of claim 11 , wherein the track has a mounting axis that runs in a direction perpendicular to the sidewalls.

13. The shell holder of claim 12 , wherein the body has an inner surface which includes the rounded shell receiving surface and the channel portion in communication therewith.

14. The shell holder of claim 13 , wherein the shell receiving surface and the channel portion are in communication with the slot.

15. The shell holder of claim 13 , wherein the shell receiving surface is radially spaced from a central axis that extends in a direction transverse to the mounting axis of the track.

16. The shell holder of claim 13 , wherein the resilient retaining element projects inwardly from and extends at least partially around the shell receiving surface.

17. The shell holder of claim 6 , wherein the body is mounted in a group of bodies on the rail arrangement such that the shotgun shells held in the bodies are disposed vertically and horizontally.

18. A shotgun mountable shell holder for holding a single shotgun shell therein comprising:

a rigid body having an external mounting surface provided with a track slidably mounted and frictionally retained on a rail arrangement having at least one rail attached externally of a shotgun, and an internal shell receiving and engaging structure sized and shaped to slidably receive and frictionally retain the single shotgun shell therein,

wherein the track and the rail having mating dovetail-shaped cross sections,

wherein the body has an outer surface that includes a pair of spaced apart open end faces interconnected by an arcuate portion having a pair of sidewalls depending from opposite sides of the arcuate portion,

wherein a slot opens through the external mounting surface between one of the end faces and the track for receiving and retaining a resilient retaining element that is frictionally engageable with an outer wall of the shotgun shell and forms part of the shell receiving and engaging structure,

wherein the track has a mounting axis that runs in a direction perpendicular to the sidewalls,

wherein the body has an inner surface which includes a rounded shell receiving surface that extends completely through the body and a channel portion in communication therewith,

wherein the channel portion is provided with an aperture that opens into the track and is configured to receive a fastener that is adapted to he secured to the rail, and

wherein the aperture receiving the fastener is aligned with a hole firmed through the arcuate portion and adapted to provide access to a tool engageable with the fastener.