An AK barrel is .585" at the front sight block. Source
5/8x24 needs .675" diameter to be threaded.
3/4x24 needs .825" diameter to be threaded.
Source
Posted: 1/30/2015 3:57:46 PM EDT
[#2]
you may be able to find an adapter, or have the threads turned off and have an adapter pined/welded on. Depends on how much work/$ you want to put in it.