Zastava M91 — updated Yugoslav/Serbian DMR in 7.62x54R (NATO-compatible optics rail). Refined from the M76 with improved manufacturing tolerances. Used by Serbian Armed Forces; exported to various markets. Type: Rifle Action: Gas-Operated Caliber: 7.62x54mmR Capacity: 10 Year introduced: 1991, Serbia Weight: 104 oz Overall length: 43.5" Status: Active Military use: Yes Intended use: military