I've never done a 3 gun before...but I'll be the first to say I'd take a home build AR (that's the only kind I have
) over any "AK" variant. I mean a super cheap one....SA&A lower, delton kit and or scavenge different sites classifieds to gather parts. If not that I'd take a non Chinese SKS over any "AK".
An Aug will set you back WAY more than a good, quality no nonsense AR.