This is the very last of our imported Russian KPV - 14.5mm Heavy Machine guns, The KPV- 14.5 mm Vladimirov heavy machine gun and its various versions are the world’s most powerful mass-produced heavy machine guns.
Machine guns of this calibre had been under development even before the war In fact, the 14.5 x 114 mm cartridge was designed for automatic weapons, and after it had entered the inventory designers attempted to develop a 14.5 anti-tank machine gun, chambered for this round On the other hand, anti-aircraft machine guns had to be improved as well. The Main Artillery Directorate adopted specification requirements for the 14.5 mm machine gun in December 1942. Development of a new machine gun began an Kovrov-based Plant № 2. Several designers, including S. V. Vladsrmirov, decided to base the new machine gun on the 20 mm V-20 aircraft cannon. The 14.5 mm KPV-44 1944-vsntage Vladimirov heavy machine gun and an anti-aircraft machine gun prototype were submitted for service tests right after the end of the Great Patriotic War in May 1945. Based on the results of the service tests, the machine gun underwent further refinement, first and foremost, as far as reliable operation in adverse conditions was concerned.
There was also the KPVB armoured-vehicle variant of the KPV, mounted on open armoured personnel carriers.
The machine gun proper was put into production at the Kovrov-based V. A. Degtyarev Plant (former Plant № 2 renamed in 1949).
The modified KPVT tank machine gun was mounted on heavy tanks (as an antiaircraft or a co-axial machine gun), combat reconnaissance vehicles, and armoured personnel carriers.
The Vladimirov machine gun is short-recoil-operated. The pressure of expanding powder gases forces the breech block and the barrel rearwards. At the same time the barrel run out spring and the mainspring compress. The muzzle booster, sliding along the receiver cams, rotates the bolt head and unlocks the breech.
The barrel, unlocked from the bolt head, is carried forward by its spring, while the breech block continues its recoil extracting the next round from the feed mechanism and the spent case from the chamber, and drawing the ammunition belt into the gun.
The next round is forced down bolt head recesses by a cam-operated arm, displacing the case of the preceding fired round unto the ejection chute, and is lined up with its cap against the firing pin hole.
When the bolt has reached its rearmost position, energy is stored in the return spring and the buffer. This carries the bolt forward, driving a round into the chamber, locking the breech, and slipping the feed claws over the waiting round in the belt. The firing pin is driven through into the cap, whereupon the round is fired. The sequence is repeated until the trigger is lowered .
Dry Firing but you need to be a strong man or woman to cock it !