It wasn't me but I can say right now thats utter bullcrap..just because you were losing and a glitch happened to a teammate of mine doesn't mean he exploited AT gun.. why would he do it only once late game?
I don't care about the defeat since me and my pal always aim for defeats anyhow.
This Semi-auto ATG was used late game. I don't know the player's motive for doing it but it is forbidden to exploit it so it'll be reported and I report it out.