New Twist on an old Luger?

It looks like it might be a nicely machined rifle barrel.

Any old .380 Nato rifle barrel would make a nice new Luger barrel (9mm is .380 cal) although the twists and lands would look a little less tight which is in line with what you observed. Still, it would makes a good shooter though and one can always pick up a genuine Luger barrel later and fit it.

Murray

Great Barrier Island NZ