For a few years now it seems the HK45 tactical model (with a suppressor-ready barrel) has only been offered with a low-profile 3-dot Meprolight sight set, unsuitable for use with a can.
This new CB date code example I just acquired came from the factory with an apparently new model XS suppressor-height tritium sight set, which didn’t appear on the product image associated with my order, but was a very pleasant surprise.
The sight is fully serrated in the rear with two discreet tritium tubes, and a fast-to-pick-up luminescent front ring around a larger front tritium tube on the serrated front sight. I think it makes for a very good sight picture in low light, and the rear tubes are not noticeable in daylight.
This sight is much like a Trijicon HD-XR set, only much taller, and using a fairly wide square rather than U-shaped rear notch. It even has a very HD-like recurved racking hook on the rear sight. No sharp edges at all. Works fine with my P30 AIWB holsters and PHLster AIWB and OWB Floodlights.
Sights seem regulated for a combat hold at 10 yards and a split-the-middle hold at 25 shooting full-power 230 grain ball.