i figure the only LMT part the kit has is the bolt carrier??
i never had a 1-8twist match barrel. so i can't say if it has the wylde chamber or not.
my preference is the NATO chamber for most purposes.
if this is LMT or not i wouldn't worry about that too much at this price. i am generally more concerned about it being a gunbroker/auction deal. my experience with online auction sites is more like--whatever you find there you can get the same for less hassle and expense somewhere else on the net.--but that is just my experience with them--YMMV