The SYKCO sheath for the Regulator looks to be as well built as the Spec-Ops. If you order the knife with the sheath with the deal now offered, it's only $10 more than the knife alone. You can't beat that deal. But if you happen to have an extra Spec-Ops lying around, the long one does fit. If you order the SYKCO Regulator sheath separately, once you figure in shipping, the price is close to a new Spec-Ops sheath, depending on where you buy it. Just saying that there are options. I'm sure a lot of folks will go for a custom kydex. To me, the Cordura military style sheaths are the ones that suit the Regulator best. It is a combat knife, after all.