 Zastava M90

The Zastava M90 was an assault rifle developed and produced by Zastava Arms in Serbia, Yugoslavia.It was developed from the famous Zastava M70 assault rifle, the modified copy of the Soviet AKM assault rifle, but with a Western type flash eliminator added on the barrel end, chambered in also Western, 5.56×45mm NATO caliber, and with that a different magazine design, similar to Western STANAG magazine 

The M90 was intended to replace the M70 in the Yugoslav army, but the breakup of Yugoslavia disrupted the production and the weapon today remains rare and was never formally used, probably due to lack of 5.56×45mm NATO ammunition.