Loading M1919 Browning machine gun

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two marines m1919a4 on namur island during world war ii


loading accomplished inserting pull tab on ammunition belt left side of gun - either metal links or metal tab on cloth belts - until belt-holding pawl @ entrance of feed way grabbed belt , held in place. cocking handle pulled palm of hand facing up, , released. advanced first round of belt in front of bolt extractor/ejector on bolt grab first cartridge. cocking handle pulled , released second time. removed first cartridge belt, advanced next round position grabbed , moved first round down chamber of barrel ready firing.


as bolt went battery, extractor grabbed next round on belt advanced , resting in feedway waiting loaded. every time gun fired single shot, gun performed sequence of extracting , ejecting spent round bolt came rearward, loading next round fired barrel, advancing belt, grabbing next round in preparation loading, chambering bolt came forward again under tension spring. if trigger held down, gun continue fire in full automatic, repeating sequence on , on until stopped.


the gun s original design water-cooled machine gun (see m1917 browning machine gun). when decided try lighten gun , make air-cooled, design gun fires closed bolt created potentially dangerous situation. if gun hot prolonged firing, cartridge ready fired resting in red hot barrel, causing propellant in cartridge heat point ignite on own without warning. each further shot heating barrel more happened, gun continue fire , become uncontrollable until ammunition ran out, since trigger not causing gun fire in situation. known cook-off, , reason gunners taught cock gun palm facing up, in event of cook-off, thumb wouldn t dislocated reciprocating charge handle. gunners trained manage barrel heat firing in controlled bursts of 3 5 rounds, delay between bursts delay heating. other machine gun designs fired in same way, though feature quick change barrels , fire open bolt, 2 features make air-cooled machine guns capable of sustained fire, , features m1919 design lacked.







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