Snooze and loose! I have wanted a GM 1 in 70 round ball barrel for my .54 Renegade for years. They always had them available for a short while in the spring. No more! I should have coughed up the $224 when I had the chance. When you do see GM barrels come up for sale they are now very spendy. I see that 'The Gun Works' in Springfield, Oregon, offers a drop in barrel of your choice. Anyone have any experience with this outfit?? Thx