A.G. Device

The A.G. (Anti-Gravity) Device, or AGD, block allows to create artificial mass, either actual, making your machine heavier, or inverted, making it lighter.

Setup defines the amount of mass created by the block. One unit equals one default chassis block or simply one weight unit from the "Weight" line available in the overview (Tab in the hangar).
 * Zero setup means no mass will be created. NB: the AGD block itself weighs one unit
 * Positive setup creates inverted, anti-gravitational mass, making your machine lighter or even hover/fly. Obviously, one AGD can make your machine 100 blocks lighter (99 counting the AGD itself)
 * Negative setup creates actual mass, making your machine heavier. This can be used to stabilize your machine

AGD as stabilizers
Place a "NEUTRAL - 100" AGD above and a "NEUTRAL - -100" AGD below your machine's center of mass to apply horizontal stabilization to it.

You can also place an AGD on a weapon body to nullify its weight, preventing it from falling down on occasions.