| Mosin–Nagant | 
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|  | 
| Type | Bolt-action rifle | 
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| Place of origin | Russian Empire | 
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| In service | 1891–present | 
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| Used by | See Users | 
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| Wars |  | 
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| Designer |  | 
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| Designed | 1891 | 
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| Manufacturer |  | 
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| Produced | 1891–1973 | 
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| No. built | c. 37,000,000 (Russia/Soviet Union) | 
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| Variants | see Variants | 
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|
| Mass | 4 kg (8.8 lb) (M91/30)3.4 kg (7.5 lb) (M38)4.1 kg (9.0 lb) (M44)
 | 
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| Length | 1,232 mm (48.5 in) (M91/30)1,013 mm (39.9 in) (carbines)
 | 
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| Barrel length | 730 mm (29 in) (M91/30)514 mm (20.2 in) (carbines)
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| 
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| Cartridge |  | 
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| Action | Bolt-action | 
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| Muzzle velocity | M91/30:approx. 865 m/s (2,838 ft/s)
M44:approx. 725 m/s (2,379 ft/s)
M38: approx. 710 m/s (2,329 ft/s)
Carbines:approx. 800 m/s (2,625 ft/s)
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| Effective firing range | 500 m (550 yd), 850 m (930 yd) with optical sights | 
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| Feed system | 5-round integral box magazine, loaded with 5-round stripper clips | 
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| Sights | Rear: ladder, graduated from 100 m to 2,000 m (M91/30) and from 100 m to 1,000 m (M38 and M44); Front: hooded fixed post (drift adjustable) PU 3.5 and PEM scope also mounted | 
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The Mosin–Nagant is a five-shot, bolt-action, internal magazine–fed military rifle. Known officially as the 3-line rifle M1891, in Russia and the former Soviet Union as Mosin's rifle (Russian: винтовка Мосина, ISO 9: vintovka Mosina) and informally just mosinka (Russian: мосинка), it is primarily chambered for the 7.62×54mmR cartridge.
Developed from 1882 to 1891, it was used by the armed forces of the Russian Empire, the Soviet Union and various other states. It is one of the most mass-produced military bolt-action rifles in history, with over 37 million units produced since 1891. In spite of its age, it has been used in various conflicts around the world up to the present day.