I am about to buy a P30L, V1 and the sight was an "issue" that I wanted to tackle after recovering form the cost of the damn gun, lol
I have seen the very nice Fiber Optic front like on the new XDM 5.25 and it looked pretty cool. This was from Hi-Viz and there was one on Dawson Percision. Trijicon have a new line called HD but not available for the HK's. They look very cool but the idiots don't think the HK demand is high enough! I hope this helps.