Hey, man. Fellow acheron owner. The tdi clip is not compatible with the sheath. As it stands, we who love this knife have had to make do with what we have. They offer a steelbead chain for it, so that you can wear it how it was intended (around your neck), or, you can do what I did. Got any paracord? Well, if you do; a great idea is to wrap the sheath in a hook weave. It may not be a clip but if you do it right, you can fasten the working ends of the cord to damn near anything. My acheron is wrapped in exactly this manner and it works just as well as any clip will. Fasten the little bugger to your belt and you've got a quick draw edc from hell. Just thought you might like to know. Good luxk, bro.