These are add-ons that can be easily installed on a model JN-129. The twin 150-mm anti-aircraft guns are known as flare launchers, and are some of the nastiest weapons known to airship crews. Flares were lightweight shells with armour-piercing high-explosive tips attached to canisters of a substance similar to Greek fire. The track shields were not standard equipment on the JN-129 because together, they added another 20 tonnes to the tank's weight, and targeting the tracks on a JN-129 was not a wise tactic to begin with, as the overlapping track segments could withstand a lot of punishment. Usually, enemy tanks used all of their firepower on the weak spots underneath the front chassis bearings or called in reinforcements in the form of heavy artillery.