so i just finished threading my WASR-10. Here's a few things i learned.
I'm not impressed with the TAT, the one for my FAL would not fit the bore and this one forced me to remove it after cutting a couple of threads cause it seemed to be acting as a jam nut restricting my cutting (NOTE I DID NOT READ THE INSTRUCTIONS FIRST so its possible if i had then i might have changed my mind
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I held my rifle vertical in a padded vise, if you have someone holding the rifle to prevent it from turning that would be handy..you can't get the vise tight enough to prevent it from turning once the cutting oil gets down there. I used brownells cutting oil (DO THREAD?) and a greenfield die holder (catalog# 88436944 from msc industrial supply) which you will need if you don't buy the kit from Dana.
I stuck a cleaning patch just past the muzzle to keep most of the crap out of the bore.
I stopped and reversed direction about every 90 degrees to break any chips free.
The die i got from brownells has a chamfered side and a non chamfered side, you're supposed to start things on the chamfered side to make it easier to start and then when you've run it all the way against the FSB back it off, flip it over in the die holder and run it back to cut the last couple of threads up to the FSB. When you do i found it easier to leave the die out of the holder and start it by hand then put the handle back on to prevent cross threading.