Having made and sold tens of thousands of air rifles fitted with the German made barrels I know how many are rejected as substandard, FX have also suffered this same problem with the same manufacturer until they are forced to make there own useing my SmoothTwist system.
They are now getting the consistent accuracy they require in production, far better than they have ever had before.
Pray tell me what you are basing your comments on, a few rifles bought and sold maybe, thought so
Ben
What has a "brass spring" got to do with anything anyway?