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Browning .50 cal Machine Gun.
Twin 50 Cal Machine guns
browning .50 cal water cooled machine gun
M2 50 CAL
Three 50 Cal. Machine Guns on each wing.
.50 cal machine gun
Barrett .50 cal
50 Cal shell casing whistle machine gun by MRoberson68 on Etsy, $25.00
suitcase sub-machine gun
Minigun - a 7.62 mm, multi-barrel heavy machine gun with the high rate of fire (2000 to 6000 rounds per minute).