The Zastava M91 is a semi-automatic designated marksman rifle based on the RPK/AK mechanism, chambered in 7.62x54R with a 24-inch barrel. The M91 served as the standard Serbian military designated marksman rifle. US-imported semi-auto versions are rare and highly collectible as examples of the Yugoslavian/Serbian military small arms tradition. Type: Rifle Action: Semi-Automatic Caliber: 7.62x54R Capacity: 10 Year introduced: 1991, Serbia Weight: 11 oz Overall length: 44" Status: Discontinued Military use: Yes Intended use: military collecting, designated marksman