A simplified version with smooth water jacket was adopted in October 1914 and manufactured until late 1920s.Usually seen on the 'Sokolov' mounting which was wheeled with a small turntable.Both were eliminated in later designs for simplicity, the crank assembly being replaced with a toggle joint that was the forerunner of that used on the Borchardt C-93 and Luger P08.
In 1942, about 3,000 PV-1 guns were converted to infantry weapons by mounting them on the Sokolov 1910 carriage.
Maxim M/32-33 is a Finnish machine gun, based on Russian Maxim M1910.
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It was developed by Aimo Lahti and put into service in 1932. A distinctive feature of M/32-33 is a snow filling cap to the water jacket that was later copied on 1941 version of Soviet Maxim M1910/30.
The Type 24 Heavy Machine Gun is the Chinese variant of the Maxim, and can be identified by the muzzle disk mounted on the barrel just ahead of the water jacket.
Unlike the base Maxim, PV-1 was air-cooled and had ROF increased to 750 rpm. PV-1 was the main weapon of many Soviet fighter planes, lile Polikarpov I-5 and I-15, and Tupolev I-4, and also mounted on reconnaissance planes Polikarpov R-5/R-Z and its ground attack variant R-5Sh.
In August 1941 large stocks of PV-1s, removed from obsolete planes, were converted to triple anti-aircraft mountings, designed by Fedor Tokarev.
MT has a perforated barrel cover instead of water jacket of original Maxim; the barrel itself was shortened.
A rifle stock and a folding bipod with tubular legs replaced the spade grips and wheeled carriage.
PV-1 (Pulemyot Vozdushny, airborne machine gun) is a Soviet aircraft mounted version of Maxim M1910.