Transcription of OPERATOR’S MANUAL
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HEAVY MACHINE GUN, .50 CAL, M2HB/QCBOPERATOR S MANUALM2 HB / QCB1 WarningHearing protection must be worn when firing this should be checked and adjusted before firing weapon, after assembling weapon, and after replacing headspace and timing can cause malfunctions, damage to the gun, and injury to bolt latch release and trigger are both held down, machine gun will fire automatically (flex only).Immediate action should be applied to a hot weapon within 10 seconds (cook-off). If round is not removed within 10 seconds, wait 15 minutes. Keep the weapon trained on the open the cover on a hot weapon. An open cover cook-off could occur and result in serious injury or machine gun has been in action, clear machine gun before anyone moves in front of the muzzle.
Change barrel at the end of the firing session or if the barrel is damaged. Cyclic Fire-This rate represents the maximum amount of ammunition that can be expended by a gun without a break in firing. The cyclic rate of this caliber .50 machine gun is 400 to 550 rounds per minute. Change barrel at end of firing session, or if the barrel is damaged.
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