The point of impact is sighted in at the top of the front sight at 25m.
If you choose to use the dots, which are less precise since you have to cover the target, it'll be roughly the same at 25m. The width of the front sight at that distance, covers about 4" of the target, making it harder to be precise.
It can cause some confusion when shooting other guns ~ such as my other favorite(s) > SIG. I have to cover the POI much more with the SIG and if I don't it causes me to shoot low. Conversly if I in a SIG shooting mode when I pick up one of my other HK's I shoot high.
I personally like the HK sight pic the best but lean slightly to the SIG trigger (another topic I know). 1911's are a completely different matter.
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