Mac uses one tag I think, and probably markets one saw as many displacments I believe. I know the one youre talking about too. I've got one sitting here in my shop, non runner at that, its crap. I'd use it for a wheel stop, or door stop more than a saw.
I think there crap.I cut and sell firewood for a living and run a jonsred 2149 and 2163.My boy cuts about 2 to 3 hours everyday with this stupid little saw and think's it's the greatest thing there ever was.About 40 tank's of gas and it's still doing the job so time will tell what it's really made of