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57 mm kan M/89 (Maxim-Nordenfelt 57 mm fast shooting naval gun L/48 model 1889) Sweden-Norway: 1890s - World War I 57 mm (2.2 in) 57 mm kan M/89B (Finspång 57 mm fast shooting naval gun L/55 model 1889) Sweden-Norway: 1890s - Modern 57 mm (2.2 in) 57 mm kan M/92 (Maxim-Nordenfelt 57 mm fast shooting naval gun L/48 model 1892) Sweden-Norway
It was capable of firing a 3.5 in × 23.6 in (90 mm × 600 mm) shell 62,474 ft (19,042 m) horizontally, or a maximum altitude of 43,500 ft (13,300 m). The 90 mm gun was the US Army's primary heavy anti-aircraft gun from just prior to the opening of World War II into 1946, complemented by small numbers of the much larger 120 mm M1 gun.
The Germans promptly developed their own version of the weapon called the Panzerschreck, increasing the diameter of the warhead from 60 mm to 88 mm (2.4 to 3.5 in), which as a result, gave it significantly greater armor penetration. During U.S. trials of the M1, calls for a larger-diameter warhead had also been raised by some ordnance officers ...
Weapon Diameter Muzzle Velocity Warhead Armor penetration (est.) Effective Range Sight M67 90 mm 213 m/s 3.06 kg HEAT 350 mm 300 m 3× M2 Carl Gustaf: 84 mm 255 m/s 1.70 kg HEAT 400 mm 450 m 2× LRAC F1: 89 mm 295 m/s 2.20 kg HEAT 400 mm 500 m 3x RPG-7: 93 mm 115 m/s 2.60 kg HEAT 500 mm 300 m 2.7× B-300: 82 mm 280 m/s
The weapon can also mount a 40 mm HK79 under-barrel grenade launcher, blank firing adapter, a straight blowback bolt (called a "PT" bolt, lacks rollers) used for firing 7.62×51mm ammunition with plastic bullets, a conversion kit used for training with .22 Long Rifle ammunition and a sound suppressor (that uses standard ammunition).
The 3-inch/50-caliber gun (Mark 22) was a semiautomatic anti-aircraft weapon with a power-driven automatic loader and was fitted as single and twin mounts. The single mount was to be exchanged for a twin 40 mm antiaircraft gun mount, and the twin 3-inch/50 for a quadruple 40 mm mount, on Essex -class aircraft carriers , and Allen M. Sumner and ...
The 83 mm version fired a 1.6 kilograms (3.5 lb) projectile with a 0.5 kilograms (1.1 lb) warhead, while the 100 mm version fired a 2.75 kilograms (6.1 lb) projectile. The rate of fire was six rounds per minute and the range 400 metres (1,300 ft) for both versions.
While probably not effective against a mugger if shot at the chest or limbs, it could potentially inflict some damage if shot at the attacker's face. [5] [6] It was discontinued in 1914 with the outbreak of World War I. [5] The 2mm gun was replaced by 3mm and 4mm weapons in the series, which was discontinued in 1938. [5]