A little more information
Thanks again Jim for the lead. I actually called Sturm, Ruger & Co. and gave them the serial number on the gun. Here's what I found out...
It is actually one of 1500 custom guns made exclusively for Acusport. The barrel length is considered a 3 5/8" barrel. It was test fired in October 2000. They also told me to contact Acusport. I did that next. When I told them I had called Ruger and what they said, they acted surprised that they had given me that information. Acusport "says" that all Ruger will tell them is that they will limit production to between 1000-2000, but will not give an actual number. Why is that? Anyway, Acusport said they will send me an information packet on the revolver in a day or two. Thanks again for the help.