it's a pity
www.muaythailand.com is currently down and under construction, it's an absolutely great place for info on traveling to thailand, be it for muay thai or not.
dave, the owner, has also been to cambodia and didn't mention anything about ak47s. one weird thing though is that apparently the population is on average very young, as a lot of the older population was killed off by the khmer rouge if i'm correct.