.60 Caliber OT-2 Machine Gun

The .60 Caliber OT-2 Machine Gun or the Oetpilgein Teinek kir 2, Kalibr Signir (Tank Machine Gun Mark II .60 Caliber), was the Main Valeric Machine gun of the Interwar Valeric Vehicles. It was Based on earlier license produced versions of the Maxim Gun, taken to an extreme, with 15mm being considered a cannon caliber in most nations, the Valeric Doctrine for Land Weapons instituted by Aurelius Tealesh III, lead to the designation of cannon requiring something to be over 20mm until after World War II leading to some vehicles having their machine guns reclassified as auto cannons during the post World War II period.

History
Aurelius Tealesh III who had taken power after World War I decided to change the standard caliber of Machine Guns from .57 (14.5mm) to a round .60 caliber, (15.3mm) leading to many valeric machine guns at this time also counting as Anti-Tank weapons, however because of this request by Aurelius Tealesh III, many of the designs that were seen as more practical, such as the .30 machine guns and .50 caliber machine guns were never produced in large enough numbers. As the design process continued it was found that the OT-2 which was an upscaled version of the Maxim, similar to the Pom-Pom Cannons, had a considerably low rate of fire, with your average vickers firing 450-500 rounds per minute, due to the rather weak design of this, it had a rate of fire more considered close to the Pom-Pom at 300-350 rounds per minute. However due to Aurelius Tealesh III's rush to put this in service it entered service with little tests and was mounted on the updated T-1B leading to it being quite a cramped turret to sit in due to the size of the OT-2, even if it was one of the more comfortable turrets of this period.

By 1928 it was observed that OT-2's without the Water cooling system itself were able to keep from melting the barrel as long as kept to 40 round bursts. Thus the OT-2B was designed as the water cooled machine gun was quite an old concept and made the machine gun quite hard to fit into turret designs that had a coaxial mount. As such the OT-2 was redesigned slightly to allow more efficient air cooling system. Though even with this update the OT-2 was already becoming outdated, leading to the design of the OT-3