One thing not mentioned in the instructions is that you should take your FSB off the rifle before threading. The die will bottom out against the FSB before the threads are cut all the way to the FSB. You'll wind up with a gap of uncut barrel.
Here's my AMD that was threaded at an angle (causing the muzzle brake to point to the right) that I cut 1/2" off the barrel and re-threaded at 14x1L.
1/2" cut off and resting on the vise
Using the tools from Brownells. Notice how much beefier they are compared to the CNC stuff.
Threaded for 1/2".
Ready for crowning.
Target crowned.
FSB relocated. Muzzle brake silver soldered through former set screw hole. Gun refinished (16 1/8", by the way, for the 922r police). Just need to install FSB retainer pins.
Here's another I did, a Chinese MAK-90 cut to 1/2x28R (AR-15 threads). This is after the FSB was reinstalled and as I am fitting the cleaning rod retainer.
Retainer and 1/2x28R muzzle nut test fit. Just a little more work to even the rod retainer humps and then refinish the nut.
Rifle complete.