I recently ordered the Trijicon HD sights w/ orange front for my HK45 from HKparts.net and had them installed today. Just how "high vis" is the front sight? Here's a picture focused on the rear sight
The front sight looks like a ball of fire landed on it.
I don't think there will be any missing that front.
First impressions on the sights are good. Like all Trijicon products I've had experience with these are well made and installed pretty easily. The sights are taller than I thought. The rear sight has a nice angle to it and is nicely serrated to reduce glare. The lamps are nice and bright (no duh, they're new) will get some shooting in this month with our IDPA season opener.