The "donor" P-14 (Mk1*) that I used to test the first new barrel was a classic. Apparently from one of the Baltic states, one clue that "interesting things" were to come was the mismatch of receiver and barrel, obvious when the handguard was removed.

The barrel was a classic "sewer pipe" but worse than that, it unscrewed by hand pressure alone and the barrel had a BNP stamp!

Upon further investigation, the three P-14 barrels in my "scrap" box all pulled up short but to wildly different points.