It's worth saying again. This is an awful idea. This isn't hollywood. People don't just run scared when they see a weapon.
If for any reason we got into some sort of altercation, regardless of who started it, and you pulled that reasonably real looking gun on me, I would shoot you. With my real gun. In real life. With real bullets. You would either suffer real injuries or die a real death. And I'm a friendly guy that wouldn't pull my gun until the absolutely very WORST of circumstances. Please consider the fact that the bad guy won't be as kind.
You're going to get yourself killed.
Also that looks more like a sig p230 than a walther.