This model would mount good, is "traditional German rounded" and is battery-less as in it takes natural light/tritium for night.
They make a mount that snugs over the base of your barrel with top mount, thus putting the sight directly in front of the receiver at the base of the barrel.
With correct MOA sized dot to correct for 4" accuracy at sighted distance, anyone can be a crack shot with a 4" P08. Put the dot on it, and it will have a hole through it.
http://www.bhphotovideo.com/c/produc...ight_RX34.html
Sheepherder, It was on my first deployment on an M4. It was beat up pretty well but held it's zero. I was always adjusting it though when range shooting. Used aim point red dot on other deployments.