The OP is on the fence and seeking suggestions ergo - no hyjack necessary. Any honest opinion pro/con is welcome.
I am always curious why people modify or customize their guns and of course, did it help improve the action, accuracy, reliability etc.
HK - not a lot of aftermarket support. I Really wanted white outline, adj rear sights. HK - you take what you can get - flat black - and be thankful.
. Only one co makes fiber optic sights for HK and they are set .250 or higher to be visible w suppressors. This is not a low profile set-up and you should know that going in.
I can try to get some pictures if you'd like ?