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Lend Lease Impressions: 57 mm M1 Anti-tank Gun

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"57 mm M1 Anti-tank Gun

American 57 mm M1 Anti-tank Gun

The gun has a semiautomatic vertical sliding breech, the semiautomatic mechanism is a mechanical type. The mount has split trails. The gun fires one-piece armour piercing shot (without explosive filler).

The following is a comparison of main characteristics of the American 57 mm anti-tank gun and our 45 mm anti-tank gun mod. 1942, 57 mm IS-1 anti-tank gun, and 76 mm ZIS-3 gun.

Characteristics

45 mm anti-tank gun mod. 1942

American 57 mm M1 gun

57 mm IS-1 anti-tank gun

76 mm ZIS-3 divisional gun

Mass in battle position, kg

570

1140

1120

1120

Shell mass, kg

1.43

2.85

3.14

6.5

Muzzle velocity, m/s

870

815

900

655

Penetration of a K-2400 armour plate at 90 degrees





100 meters

70 mm

78 mm

98 mm

75 mm

300 meters

65 mm

70 mm

91 mm

72 mm

500 meters

61 mm

63 mm

86 mm

69 mm

1000 meters

51 mm

48 mm

71 mm

61 mm


The American 57 mm anti-tank gun weighs about as much as our 57 mm IS-1 anti-tank gun, but the penetration is significantly less than that of our gun, and is only somewhat higher than that of the 45 mm anti-tank gun mod. 1942, which weighs almost half as much as the American gun.

As a result of trials performed with this gun, it was established that the main drawback is the dependence of the recoil mechanisms on the temperature of the hydraulic fluid (in winter conditions). Until the fluid is heated, the gun will not return to its original position after recoil.

The gun has insufficient clearance, the diameter of the wheels is too small, and the suspension is rigid, which lowers the qualities of the gun on maneuver, especially when pushing it across the battlefield with the force of the crew. 

The design of the gun does not satisfy modern requirements for anti-tank guns, and makes it suitable for stationary defenses only.

57 mm armour piercing tracer shot

Ammunition for the 57 mm M1 anti-tank gun

57 mm armour piercing tracer shot, American make
The results of trials were satisfactory. The shot is a modern design, but it is inferior to domestic 57 mm armour piercing shells due to the higher muzzle velocity of the latter.


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