Restricting lawful gun sales only encourages unlawful ones. 

Via Breitbart: 

Cities and townships are using zoning restrictions to create “gun-store-free zones” around the country. This includes over 20 such zones in California alone.

According to the Trace, a gun control journalism outlet, such use of zoning codes allows cities to “effectively ban firearm stores” in lieu of Congressional refusal to pass more gun laws.

Piscataway, New Jersey, is one of the latest townships to adopt this approach. They have no federally licensed firearms dealers in their township, and the town council hopes to use a zoning resolution to keep any licensed dealers from setting up shop in the future. Their resolution, according to the Trace, “bans gun stores from opening within 1,000 feet of schools, parks, health care facilities, and other sensitive locations. While the new zoning law does not explicitly forbid gun stores from opening in the suburb, it makes dealers subject to conditions that almost no location meets.”

Read more here.