Doublestar/J&T Chrome Lined barrels

[js8588]

Looking at putting together an upper for steel case wolf ammo and just wanted to see what the Hord's opinion/experience with these was.
https://jtdistributing.com/catalog/produ...egory/324/

I don't love that they're 4140 and if I could find one I'd prefer a Sabre defense but those seem to be pretty much gone.