Thanks for taking the time to measure it for me. This is a raw lug welded to a new barrel, the barrel extends about .050 past the underlug and I was getting ready to turn the barrel flush with the lug, looks like I will take off some to make it about 1.700 and send it out to check fit, I can always take a tiny bit more off, I take it that your barrel breaches are flush with the lug. Larry