Heavy Machine Gun

About
A heavy machine gun is an automatic firearm that is too large to be held in hand. These guns are mounted on stands and have much higher capacity than small arms. Such weapons are used for gunning down large ground units and defending against incoming crafts.

Obtaining
A heavy machine gun cannot be obtained as an item. A structure spawner with the HMG label must be obtained and used accordingly.

Control
HMGs have a few more controls than regular handheld firearms. Since HMGs are mounted on stands, their positions must be adjusted in order to hit targets at angles. The HMG controls depend on which slot of your hotbar is selected. Below are the slot mappings for a HMG:
 * Right clicking the gun with slot 1 selected will fire the gun. Quickly right clicking will fire the gun one time, and holding down right click will fire the gun on full automatic action.
 * Right clicking with slot 2 selected will rotate the gun 1° counterclockwise (relative to top view). Hold down right click to rotate faster.
 * Right clicking with slot 3 selected will rotate the gun 1° clockwise (relative to top view). Hold down right click to rotate faster.
 * Right clicking with slot 4 selected will tilt the gun 1° down. Hold down right click to rotate faster.
 * Right clicking with slot 5 selected will tilt the gun 1° up. Hold down right click to rotate faster.
 * Right clicking with slot 6 selected will display a message in chat showing how much ammo is left in the gun.

Refilling ammunition
To refill a HMG, hold one or more bullets of the correct caliber in your right hand, and right click the gun with that hand. '''It is a misconception that you must use slots 7, 8, and 9 for refilling. When refilling, it does not matter which slot you click the gun with. Clicking with slots 1 - 6 will not perform the actions shown above if there is ammo in your hand.'''

Despawning and Destruction
To despawn a HMG, right click with a wrench. The gun will disappear and a structure block will be left on the ground, along with any ammo the gun had inside. If this does not happen, the gun is most likely cooling down. A HMG must not have been fired, reloaded, or rotated for a minimum of 120 seconds before it can be despawned. This is to prevent enemy players from simply rushing up to a HMG gunner and despawning his gun.

HMGs can be destroyed in three ways: HMGs are immune to lava/fire damage, and cannot be broken with left click.
 * explosions of sufficient magnitude
 * shooting until broken (a HMG can withstand up to 1000HP of bullet damage).
 * causing the HMG to fall into the void

HMGs can be washed away with flowing water.