The Blade Tech duty holster is junk. We had a lateral from another agency come over with one and wanted to carry it (our policy only allows Safariland Level II and II). I picked him up by his holstered empty gun and the holster popped loose from the mount. You can pick someone up by a Safariland all day long and it stays put.
Needless to say he wasn't allowed to carry it. Stick with Safariland.