Why don’t the police go into the trouble areas with dogs and sniff all the guns out. Then run the numbers on the guns and arrest the people who were in possession of stolen or illegally purchased weapons. If the guns aren’t stolen, but are not at the house of the current owner, contact the owner and find out how the gun got there. If there isn’t a good explanation, put that person on a straw buyer’s watch list.
aside from the fact that you’re suggesting blatant violation of the 4th, you know that cops would opt to goto “nice” neighborhoods where they don’t have to worry about getting shot.