This is the Covenant Design Guardian sheath that comes with the Military Contract Guardians.
This version comes with the Skallywag IWB/OWB clip attached.
You can also purchase the backer on to which you can install a single molle lok on center line of the knife for Molle mount. This is the set up for the Military Guardians. You can find Backers on the site but you will have to source the Molle Loks on the Web.