I'm looking at mounting a Strike J-Comp v2 to my PARA when it gets here. but the J-comp comes in 1/2x28 RH, and 14-1 LH. or standard .223/5.56 and AK 7.62. AK's 14-1 thread is non-standard (its usually 14-1.5 or 14-2)
basically I want to figure out if you can run a tap into the AK J-comp and have it work, if the major diameter on the 14-1 is actually 14mm, it's a little bit small. 0.5511 against 0.5625, which is only 0.0114 small, the pitch of a 14-1 is naturally 1mm, or 0.03937 to the 1.058mm or 0.04167 of the 9/16-24. (0.00197 difference) (a 9/16-25.4 would be almost exactly a 14-1 thread.)
if my math is right- a 9/16-24 should almost perfectly fit on a 14-1 thread. but a 14-1 thread should be a little bit tight over a 9/16-24.
seeing as I'm already looking at doing the insanity of putting a Zhukov Yugo stock on my FAL when lear gets the adapter them made, would running a tap into a AK threaded muzzle brake kill it? could you just run a 14-1 onto the 9/16-24 muzzle?
(this might belong in gunsmithing...)