At level 21, the Machine Gun turns massive and gains a new color scheme of dark green, light green, and grey. A large metal cockpit with a thin, rectangular viewport now sits upon a small, steel baseplate, with a light green hatch on top. The two barrels once again resemble the level 8 barrels. They are held up by two large dark green arms with silver piping on top. Two large, dark green ammo boxes sit on the back of the structure.. Which defense hurts the Warriors more? Rebalanced machine guns or flamethrowers? Increased machine gun spread against Warriors! Best Boom Beach gameplay . All levels of the Machine Gun are listed and explained on this page. Check out Tips and Upgrade Costs for the Machine Gun in Boom Beach..