I have that holster (Blackhawk Mark IV Airborne).
It does a pretty good job of fitting most medium and large automatics and there’s three levels of retention (snap, velcro and grip-strap). However, the introduction of the Safariland 6004 series rendered it practically obsolete, unless you switch between different pistol models often.
I guess that makes me, and my usual daily carry holster, really, really old, and probably also *practically obsolete.*
But it works.