i have a vz-58, great gun. lighter and shorter than the ak and way more accurate. i run it dirty and have never jammed unlees the lip of the case breaks off my cheap russion steel cases. but i belive the op was looking for 5.45x39. none of the guns ppl are mentioning are of this caliber.
except this one, which should be exactly what he is lookig for
http://centerfiresystems.com/AKAGUN-TANTEL.aspx