Dustin,
the tubes were mounted on the rear of the action and inlet into the wood. I owned that gun a long time ago and forget exactly how it was accomplished. I think the tubes threaded in to the action but could be mistaken on that detail, That gun had the barrels refinished by Oscar Gaddy in black and white. It had been owned by a member of our Rocky Mountain Vintagers club, I knew the former owner and the gun when I went in to the small local shop that had it for sale. I explained to the gunshop owner several times that the gun was not a James Woodward. I eventually bought it for 2500$, a pretty big mark down from the 10K he had on it when I first came across it in his shop. I think it took me the better part of a year to get him to understand what it was and the real value of the gun. I never did shoot that one very well, too much drop if memory serves.
Steve
