Model 1891/30 (винтовка образца 1891/30-го года, винтовка Мосина) – The most prolific version of the Mosin–Nagant. It was produced for standard issue to all Soviet infantry from 1930 to 1945. Most Dragoon rifles were also converted to the M1891/30 standard. It was commonly used as a sniper rifle in World War II. Early sniper versions had a 4x PE or PEM scope, a Soviet-made copy of a Zeiss design, while later rifles used smaller, simpler, and easier-to-produce 3.5x PU scopes. Because the scope was mounted above the chamber, the bolt handle was replaced with a longer, bent version on sniper rifles so the shooter could work the bolt without the scope interfering with it. Its design was based on the Dragoon rifle with the following modifications:
Flat rear sights and restamping of sights in metres, instead of arshinii.
A cylindrical receiver, replacing the octagonal (commonly called "hex") one. Early production rifles (from 1930 to 1936) and converted Dragoon rifles retain the "hex" receiver.
A hooded post front sight, replacing the blade on previous weapons.