Well. I bought that 11.5 fsp barrel today to put in my PSA upper. And the FN CHF barrel needed the fsp chopped.
So here's what the stubbornness of a mule, 3 hours, a couple beers, a leather glove, a bfh, a vice, some punches, 2 wore-the-fuck-out handsaws, some good hand files, a pair of...