justr make sure your barrel has enough meat to hold the threads. My Mak90 is to thin or it looks like they machined the threads off.
Another NES bought the DIY kit and his barrel was a bit "thick" and could not get the tap die started. I think he eventually slowly removed some barrel metal and got it to work.
just stuck my hand in the safe and measured my barrel it cam in at .500" wich IIRC is to small for the "standard" AK , I think my option was 28x 1/2
I just left it alone at that point.