Summary: all equipment, resources,
and most marine activities, depend upon structures,
selected and placed by the commander. Placed
structures must be built by marines.
Function: allows turrets
to be built within range.
New Equipment: Commander can now
purchase turrets – automated gun emplacements
used for base and perimeter defense (see turrets
for more info.).
New Structures: arms
lab, advanced
turret factory
To get an overall picture, see the 
New Equipment: Commander can now
purchase turrets – automated gun emplacements
used for base and perimeter defense (see 
New Structures: 
Cost:
Build time
Armor Pts. 