I acquired these barrels as part of an overstock lot of rifle barrels from a firearm manufacturer. I do not know very much about these barrels so please make sure they will work correctly/safely for your application using a competent gunsmith. This is what I was told: Manufactured by Lothar-Walther in Germany using pulled button rifling. .50 BMG. Stainless steel. 32" length. Capable of sub-MOA accuracy with match ammo.
Once again, I got these second-hand as overstock items. I will try to answer any questions you may have, but my rifle barrel knowledge is very limited.
There are three barrels that appear to be the same. I'd rather sell as a lot to one buyer but will consider selling individually. Thank you.