There is some connection between Mantis and QM, but nobody knows just how far that connection goes. QM says that they were asked by Mantis to do a higher-end version of their Tough Tony, and they are obviously the same basic design. Their other 3 models thus far also bear some very Mantis-esque desing features, and they have stated that they were designed in conjunction with Jared. So far, that's all anyone knows. It's possible that QM is a wholey seperate entity that is just working in conjunction with Mantis at this early stage in their life, and that they may branch out and offer other products of different designs as time goes on. It's also possible that they are just Mantis rebranded, as Planterz suggested. There just isn't enough info out there at this point to make a determination one way or the other (imho).
Knifetten, if you like their offerings, then by all means buy what you want. I would suggest you search Mantis and Quartermaster here first, read up on them, and then make your decision. Some don't want anything to do with Mantis or QM (guilt by association, if you will), while others like them and like their products just fine (though few would admit it here, lol). You have to decide that for yourself, though. You are the one buying the knife, and you will be the one using and carrying it, so make you choice based upon your own tastes and priorities. :thumbup: