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EMEGUY421 said:The Chinese make an AK variant in 5.56MM for export into civilian sales.
Don't forget they also made them for export sales to client countries, selective fire versions w/spike bayo, and also an AKS version. Nigeria was one of these countries. The rifles had unique threads and a special cap (unlike the usual muzzle brake/muzzle nut) for a grenade launcher.
The PRC did away with the muzzle nuts when they went from machined AK47 style recievers to the stamped AKM style. The only advantage to these were the use of a BFA in those days (post 1975).
Problems encountered with these 5.56 x 45mm (M193 twist was 1/12in) were severe trigger vibrations, so much it actually hurt when squeezing the trigger. Mods were made in the gas piston, as a channel (length ways) was machined on each side of the pistol head, allowing more gas to escape through the relief holes on the tube assembly. I do not know if this mod was done on the semi only versions.
Cheers,
Wes