British Special Boat Service / Special Air Service
 
Figures come with attached heads. 
One figure has a separate arm.
All Bergen - back packs are separate and need to be glued.  
Wearing cold wet weather kit, suitable for the Falklands War, these chaps will also work for northern Europe.
From left to right ;
M16A1
M16A1
CAR-15
MI6A1 - M2O3GL - LAWS.