now i may be wrong with this cause i'm not sure if it's the same sheath as the one for sale but, the scrap yard sheath that my brother got for his SOD fits the TT Regulator. It's a loose fit and needs the strap buckled to make sure it stays in place. if it's the same sheath as the 6" sheath on sale in the shop, then it will work. IF, and that's a big IF, it is the same sheath.