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  1. M4 autocannon - Wikipedia

    • The 37 mm Automatic Gun, M4, known as the T9 during development, was a 37 mm (1.46 in) recoil-operated autocannon designed by Browning Arms Company and entered service in 1942. The M4 and its variants would primarily be manufactured by Colt's Manufacturing Company and Oldsmobile (under-contract by Colt) and is therefore sometimes referred to as the … 展开

    Design

    Designed primarily as an anti-aircraft weapon, the gun had a muzzle velocity of 2,000 ft/s (610 m/s) and a cyclic rate of 150 r… 展开

    Feeding mechanism

    As the gun was originally designed, ammunition could be fed by a 5-round clip, a 15-round link belt, or a non-disintegrating 30-round endless belt magazine. The 30-round endless belt version was used exclusively in pr… 展开

    Firing cycle

    Initial loading and cocking of the gun were accomplished manually. A safety feature incorporated in the design of the trigger mechanism prevented firing the round until the breech-block assembly was in the battery position. … 展开

    US Army Air Forces

    The 37 mm cannon was disliked by pilots for its low muzzle velocity, resulting in more pronounced drop than other contemporary weapons.
    The only standard aircraft armed with the M4 to see servic… 展开

    US Navy

    The M4 37 mm (1.46 in) automatic cannon was mounted on numerous U.S. Navy PT boats as deck guns, beginning with the Solomon Islands campaign. Primary targets were the landing barges being used to move supplies d… 展开

    Soviet Air Forces

    During World War II the United States supplied the Soviet Air Forces with the M4-equipped P-39 Airacobra and P-63 King Cobra. The U.S did not supply M80 armor-piercing rounds for these Lend-Lease aircraft—instead… 展开

    US-built contemporaries and successors

    • The 37 mm M9 autocannon was a derivative of the 37 mm M1A2 flak gun and used the longer, more powerful 37×223mmSR cartridge. Compared to the M4, the M9 had 50% more muzzle velocity (3,000 fps) from … 展开

     
  1. M4 cannon | Gun Wiki | Fandom

  2. USA 37 mm/56 (1.46") M4 - NavWeaps

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  8. 37 mm Autocannon M4 / M10 - Internet Movie Firearms Database

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