cqb do a search on ZM in general discussions and you'll find tons of info. I don't think anyone here that owns a ZM calls it a tactical rifle though [:p]
Bear hunter has one with all the bells and whistles (including the $300 plus adjustable folding stock), mine is an older model, I have an M4, 20" HBAR and a 9mm upper, this is something different. Is it worth the money? For us it is, at $1600 for the kit, it isn't for a lot of people that would rather (and can) get an FNC.