Dean is right, there will be several guys at the Kalamazoo show that would be interested in your gun. I know there will be at least 4 other Atlas guns at the show. The Atlas company guns are covered very well in Arni Dunathans book The American BB Gun. I have the book for sale and they will also be at the Kalamazoo show for sale. Your gun is a single shot and the sleve on the barrel is not original. Most likely a repair to a crack or split. If you would like a flyer to the show please let me know at wespowers@comcast.net