I bought the barrel new with a Weaver top mount base #62. I have a Model 41 made in the 60s and the barrel was not tapped for a scope mount. The new barrel fit my frame perfectly and was extremely accurate. It is the 5 1/2 inch barrel and will come with the Weaver mount. It has been in my safe for 2 years and needs a new home. It has had less than 200 rounds through it. It is the same as new. Can send pictures upon request. The $170 does not include shipping.