Work on the creation of a prototype of a curved machine gun with a barrel curvature of 90 degrees was carried out by the designers N. F. Makarov, who completed all the projects of the curved assembly, and K. T. Kurenkov, who worked out the ball mount. The machine gun was intended to arm tanks, more precisely, to protect them at the closest range, in the so-called. A “dead zone” that cannot be fired by a conventional straight-barreled (rectilinear) machine gun. To solve the problem of short-range defense of a damaged or damaged tank, it was proposed to place this system on the hatch of the tank turret. The attitude of the tankers to this weapon was negative. In this regard, the idea of protecting tanks with a curvilinear machine gun was recognized as irrelevant, and all work in this direction was stopped.
TTX
Caliber, mm: 7, 62x39
Bullet muzzle velocity, m / s: 825
Barrel curvature, degrees: 90
Machine gun length, mm: 1173
Barrel length with flame arrester, mm: 658
Sighting range, m: 1500
Weight with ball mount (without ammo unit), kg.: 27, 3
Weight without spherical installation (without BC), kg.: 12, 8
