The Russian PM M1910,Adopted in 1910 by the Russian Army, the PM M1910 was a Russian variant of the

The Russian PM M1910,Adopted in 1910 by the Russian Army, the PM M1910 was a Russian variant of the famous Maxim gun chambered for 7.62x54R.  Every major power at the time had their own version of the Maxim, however what made the PM 1910 unique was it was produced with a small wheeled carriage mount featuring a shield intended to protect the gunner.  The PM1910 was was exact in almost all other features, including the use of a water cooling system, a 250 round belt feeding system, and a short recoils toggle locked action.  If functioning properly it could fire around 600 rounds per minute.  Total weight, including gun and carriage, was around 140 lbs.  Some models were produced without the shield and with a lighter tripod, but most were produced in wheeled carriage format.During World War I the PM M1910 became the primary heavy machine gun of the Russian Army.  After World War I it would continue to see use throughout the Polish Soviet War, Russian Civil War, and the Winter War.  A number were exported to other countries such as Finland, Spain, China, and Turkey.  By 1939 most nations had eliminated or where in the process of phasing out use of Maxim designs.  By then lighter and better guns had come into use, especially those issued to the Germany Army.  The Soviet Union too intended to adopt more modern designs and ended production of the PM M1910 in 1939.  However, after the invasion of Germany, the PM M1910 went back into full production in 1941.  Eventually newer designs were produced, such as the SG-43 Goryunov, however the PM M1910 continued to be produced and issued alongside newer models of machine guns.  Production finally ended in 1945  -- source link

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