
As a result, the rifle was adopted as the standard Finnish Army weapon, and surplus Mosin–Nagants were purchased from other European nations which had captured them during World War I. The official designation of these were "3-линии пехотная винтовка образца 1891–го года" which translates to "Three Line Infantry Rifle, Model of 1891".

When Finland achieved independence from Russia, over 190,000 Model 1891 infantry rifles were already stockpiled in the ex-Russian military depots within Finland. Three other models would subsequently be put into service prior to WWI: the M1891 Dragoon, the M1891 Cossack, and the M1907 Carbine.

However due to legal issues with Nagant over certain design aspects of the rifle, his name was attached to the design as well, leading to the name used in most of the world, the "Mosin-Nagant Model 1891".

The name "Mosin-Nagant" is in reality somewhat of a misnomer, as the design chosen was designed by Mosin, not Nagant. This is what gave rise to the official name of the rifle, the "3-line rifle, Model 1891", as it was in. Three designs were submitted, and at the time in Russia bullet diameter was measured in "line"s, where one line was 1/10 of an inch. During the course of the war, it became apparent that Russian troops needed a modern bolt-action rifle to compete with the rest of the world, so they started evaluations in 1889 on what would become the general issue rifle for infantry troops. The history of what is known as the "Mosin-Nagant" rifle begins in the late 19th century in Russia, following the Russo-Ottoman war. The reasons for this are multiple, including both the size of Russia and later USSR, as well as the long service life of this design, which is still in use today in some locations. This number easily surpasses the Lee-Enfield, Mauser GEW98 and Mauser K98K in number produced. The Russian "Mosin-Nagant" bolt-action rifle is arguably the most-produced rifle in history, with around 37 million being produced in various versions in several different countries. It has lots of issue markings, as well as partly matching serial number N 177235, which is on barrel and bolt. A real pre-1898 Antique Russian Mosin-Nagant M1891 Full Length Rifle, more officially referred to as the "Three Line Infantry Rifle, Model of 1891." This particular one was later refit in Finland to the Finnish M/91 Mosin-Nagant standard, and fitted with a new stock.

These are so very rare, and this is the first example that we have seen in quite some time.
