The MMG 9000 does not have any visual differences between levels.
At all levels, the MMG 9000 is a quadruple-barrel Machine Gun with a stone base. The main body is made out of metal. A small red scope is seen on the top. A handle is also visible at the top. There are two ammo drums at the top that seem to have two cables connecting to the middle.
This defense is very effective at destroying Warriors. It is not recommended to attack an MMG with them.
Against all other Troops, this defense is still effective. It can deal decent damage to any troop.
However due to the reload times of the Shock Blaster, the MMG 9000 fires the fastest on average, shooting on average 11.1 shots per second compared to the Shock Blaster's average of 7.7 shots per second.
This weapon's full name is the Massacre Machine Gun 9000. Lt. Hammerman reveals this information when the player discovers his level 50 base.
The MMG 9000 is encased in titanium armor according to the Villager who reports this after Blackguard transmissions are intercepted during the early stages of the campaign.