from an old article i found:
"I have to disagree on the Chinese being the best option for a .223 AK. One of my FFL buddies had one and said it keyholed with 62gr ammo, I think it's a 1:12 twist. The Arsenals, Saigas, and SAR/WASR use 1:7 (old Saigas may have 1:9) so they can use a larger varity of ammo."