I have an 29" long special order bartlien stainless .277 blank . Blank is not threaded!I have lost interest in this project sold the gun and this needs to go! The markings on the barrel are at 20,22,24,& 26. inchs so I can measure diameters what someone asks. Asking $425.00 shipped if you would like insurance it's up to you. Thanks for looking. Tribb