Other than special operations division and few other special units, HPD officers buy their own firearms. Uniformed officers use level 3 safariland holsters. Detectives use what works for plain clothes.
State agencies, and feds of course, have issued firearms, 99% of agencies around these parts are all individual officer purchase.
Surprises a lot of folks.
Blackhawk does have their new T series holsters which eliminates the SERPA issue. They're okay, though they did have a recall on the new holsters for P320s with Thumb Safeties (rarely seen around these parts in LEO hands).