Apparently alot of the composition class_names on Armatech are wrong. Here's a list of the correct class_names:
//compositions
SmallBase
CityBase01
CityBase02
CityBase04
BunkerMedium01
BunkerMedium02
BunkerMedium03
BunkerMedium04
BunkerMedium05
BunkerMedium06
BunkerMedium07
BunkerMedium08
BunkerMedium09
BunkerMedium10
GuardPost_US
GuardPost2_US
GuardPost3_US
GuardPost4_US
GuardPost5_US
GuardPost6_US
GuardPost7_US
GuardPost8_US
SmallNest_US
VehicleShelter_US
FuelDepot_US
CheckPoint1_US
AntiAir1_US
Firebase1_US
FuelDump1_US
RadarSite1_US
VehicleParking1_US
HeliParking1_US
AirplaneParking1_US
WeaponsStore1_US
Camp1_US
Camp2_US
Camp3_US
MediumTentCamp_RU
MediumTentCamp2_RU
MediumTentCamp3_RU
AntiAir1_RU
Firebase1_RU
FuelDump1_RU
RadarSite1_RU
VehicleParking1_RU
HeliParking1_RU
AirplaneParking1_RU
WeaponsStore1_RU
Camp1_RU
Camp2_RU
GuardPost_CDF
VehicleShelter_CDF
TankDitch_CDF
TankDitch2_CDF
CityBase03
BunkerSmall01
MediumTentCamp_napa
SmallTentCamp_napa
SmallTentCamp2_napa
Camp1_INS
Camp2_INS
FiringRange1
FiringRange2
FiringRange3
FiringRange4
FiringRange5
FiringRange6
FiringRange7
FiringRange8
FiringRange9
FiringRange10
FiringRange11
FiringRange_Wreck1
FiringRange_Wreck2
FiringRange_Wreck3
FiringRange_Wreck4
FiringRange_Wreck5
FiringRange_Wreck6
FiringRange_Wreck7
FiringRange_Water1
FiringRange_Water2