Saitek III - Manual (Page 29)

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Descent ™ 3
Quad Laser:
Modifies your lasers to fire four shots at once
instead of the standard two.
Rapid Fire:
Allows all energy weapons to fire at a quicker rate
for 30 seconds.
Full Map:
Downloads the entire blueprint of the facility to
your Automap.
Vauss Clip:
Gives you additional ammunition for the Vauss
Cannon.
Mass Driver Round:
Gives you additional ammunition for the Mass
Driver.
Napalm Fuel:
Gives you additional fuel for the Napalm Cannon.