SSG had several casualties during training in the past .. From what I learn they are trying to minimise it altogether.... Many SSG volunteers also got disabled or Category C (as the army calls troops troops disabled with permanent injuries etc) even during the "interrogation" part of the training where each volunteer is given a mission and in the course of that mission beaten to a pump in order to break him and extract that mission info & break him.
Because AKs (AK-103 is also used by SSG),M-4s,16s,FN-2000s,ARs etc are their main rifles.. For LMGs or HMGs they use PKMG,MG-3,Minimi etc..
Mortars,RPGs etc are also part of their inventory.