I just got my second H&K. A P2Ksk 9mm with factory night sights. They do look different than the white dot sights on my P2Ksk .40 so I know they are not the plain sights. The problem is that they don't glow at all. they are totally dark.
I've held the gun out in the full sunlight, run inside to a totally dark room... nothing. Hold it 1" away from a halogen light until the gun gets warm, run into a totally dark room... nothing.
The gun has an AE manufacture stamp and the test cartridge was done in 2004. Would sitting in a totally dark box for 3+ years kill the glow in the dark dots?