I took my new m6 + buy brown kydex hunting with me for the past week+. I spent a lot of time fighting the sheath trying to find a comfortable carry that high on my waist. I ended up clipping the teklok to the front pocket, and hanging the kydex + knife inside the pocket, handle exposed. The pants had big enough pockets that this wasn't cumbersome, but it isn't practical on any pant other than these.
I'm still not 100% on the sheath. I like a horizontal or angled carry, but the lips of my kydex aren't really strong enough to hold it that way without it falling out if jarred. I think a lot of that was that the knife is handle heavy when carried horizontally, so the single teklok is attached to the kydex in a position that allows the handle to dip below level, biased towards the ground and ready to fall out. I made a paracord lanyard with monkey's fist for it, then looped the monkey's fist through a belt loop as a kind of 'knife safety' but it required more work to unsheath the knife when needed.
That short spec-ops looks nice but I can't tell if it would allow me to lash it horizontally to a belt. Can you report back if you get it please?