Don't know much about AICS other than it looks to be the same setup as on my AWP. I will note that on the AWP the action is not only screwed onto the chassis but also chemically bonded (JB Weld type).
I'm sure alot of my AWPs accuracy has to do with the "stock" and I agree with their ad.. it is boring in it's consistant accuracy (if I do my part).
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Schmit
GySgt, USMC(Ret)
NRA Life, Lodge 1201-UOSSS
"Si vis Pacem Para Bellum"