Adjustable rack

1. A rack comprising:

a rail having a stepped channel formed in the rail, the stepped channel having a first region with a first width, a second region with a second width, and a third region with a third width, the first and third widths being greater than the second width and the second region being between the first region and the third region, wherein the rail includes a pair of protrusions each extending into the channel;

a connector having a body with at least one flange, the body being insertable into the second region and the at least one flange being insertable into the third region, the connector further including a threaded aperture;

a holder having a flat portion configured to insert and nest within the first region, the holder further including an aperture, wherein the holder and connector are configured to be detachably coupled together; and

a threaded fastening member configured to pass through the aperture in the holder and be inserted within the threaded aperture of the connector so that when the threaded fastening member is rotated it draws the at least one flange against rear surfaces of the pair of protrusions so the pair of protrusions are clamped between the holder and the at least one flange with a force to prevent the holder and the connector from moving along the channel, wherein sidewalls of the first region prevent the holder from rotating while the threaded fastening member is rotated.

2. The rack of claim 1 , wherein a width of a portion of the holder is about the same as the first width and the first region is defined by a pair of walls which prevent the holder from rotating when the holder is inserted into the first region.

3. The rack of claim 2 , wherein a depth of the body is smaller than a depth of the second region.

4. The rack of claim 3 , wherein the holder has a substantially J-shaped.

5. The rack of claim 4 , wherein a thickness of the holder varies along a length of the holder.

6. The rack of claim 5 , wherein the holder is configured to hold at least one of a barrel and a butt of a rifle.

7. The rack of claim 3 , wherein the holder includes at least one finger configured to insert into a barrel of a gun.

8. The rack of claim 1 , wherein the at least one flange is a pair of flanges.

9. The rack of claim 1 , wherein the stepped channel is symmetric.

10. The rack of claim 1 , wherein the holder directly contacts front surfaces of the pair of protrusion and the at least one flange directly contacts a the rear surfaces of the pair of protrusion.

11. A rack comprised of:

a rail having a channel formed in the rail, the rail including a pair of protrusions protruding into the channel to form a first region above the pair of protrusions, a second region between the pair of protrusions, and a third region below the pair of protrusions, the first region having a first width, the second region having a second width, and the third region having a third width, the first and third widths being greater than the second width;

a T-shaped connector having a body with a flange, the body being insertable into the second region and the flange being insertable into the third region and configured to contact bottom surfaces of the pair of protrusions, the connector further including a threaded aperture;

a holder having a flat portion configured to insert and nest within the first region and having a width about the same as the first width, the holder further including an aperture, wherein the holder and connector are configured to be detachably coupled together; and

a threaded fastening member configured to pass through the aperture in the holder and be inserted within the threaded aperture of the connector so that when the threaded fastening member is rotated it draws the flange against rear surfaces of the pair of protrusions so the pair of protrusions are clamped between the holder and the flange with a force to prevent the holder and T-shaped connector from moving along the channel, wherein sidewalls of the first region prevent the holder from rotating while the threaded fastening member is rotated.