Linn,
Just in case you don't know about the reinforced loop used on BTFE guns, I found a previous post that Larry made and copied it here for your reading pleasure.
"One thing you might want to check is if the barrels had the reinforced forend loop installed. Some shooters have had problems trying to use a beaver tail forend with out the proper loop. The extra force applied to the loop can pull it off the barrels. I have attached a photo of two barrels sets with the top one having the proper (for BTFE) reinforced loop and the bottom set with the standard loop. " Attached Thumbnails