i guns i saw were the ACR (google it) which looks like the sig 552 commando
the famas
also he ran over a SA-80 but it came up with a Aug para
ACR
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Famas
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SA-80
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Aug para
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but also watch the actual gameplay (not the microsoft conference the one where robert bowling is asked questions about the game) at around 5 mins 20 when he kills the chap by the truck the SA-80/Aug is there