Any ideas on this barrel?

[Drifter]

BRO has used BHW barrels previously, and BHW makes barrels in that profile. I think inscriptions on BRO barrels made by BHW are sometimes just forward of the barrel extension where they would be covered by the barrel nut. The BHW website appears to be down at this time, so no help there at the moment.

Check to see what type of rifling is inside the bore. I think that BHW usually uses 3-groove polygonal rifling.

BHW = Black Hole Weaponry