They get their guns from other states.Limiting access to guns has to come from the federal level like fully automatic weapens bans.
https://www.usnews.com/news/best-st...nd-truths-about-chicagos-guns-and-murder-rate
The Myths and Truths About Chicago's Guns and Murder Rate
About 60 percent of illegal firearms seized and recovered by Chicago police come from out of state. They're traced back to states with less restrictive firearms regulations, with Indiana at the top of the list.
The Associated Press
BY SHARON COHEN, AP National Writer
CHICAGO (AP) — Chicago police are wrestling with gun violence, blamed largely on gangs. President Donald Trump has frequently singled out the city for criticism , calling the crime problem "a total disaster" and claiming Chicago has the strongest guns laws in the nation and still hasn't been able to curb violence. But there are common misunderstandings about Chicago's homicide rate and how the city regulates firearms. Here are some of the myths and truths:
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IS CHICAGO THE NATION'S MURDER CAPITAL?
No. This is a common misperception based partly on the national attention Chicago has attracted in recent years. The Pew Research Center reported in November that when adjusting for population, Chicago has recorded fewer murders per capita than many other smaller U.S. cities. Chicago ranked 14th among cities with at least 100,000 people in 2017. FBI statistics released this fall found St. Louis had the highest murder rate in 2017 — 66.1 homicides per 100,000 people. The Pew report said Chicago did have the highest actual number of homicides in the past few years. In 2016, there were 762 homicides. Last year, homicides dropped to 650. As of Dec. 6, there were 534.
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DOES CHICAGO HAVE THE TOUGHEST GUN LAWS IN THE NATION?
No. Trump and his administration have wrongly made this assertion . Chicago passed a ban on handgun ownership in 1982. Those who'd already purchased and registered their handguns were allowed to keep them. In 2010, the ban was struck down by the U.S. Supreme Court, and in 2013, Illinois became the last state in the nation to approve concealed carry.
Illinois is considered to have fairly tight gun laws. The state requires gun owners to obtain licenses and face background checks. It also imposes waiting periods on purchases. But unlike New York and California, Illinois, among other things, does not ban assault weapons or large-capacity magazines and does not require a state license for firearms dealers or one to sell ammunition, according to the Giffords Law Center to Prevent Gun Violence.
This year, Gov. Bruce Rauner signed into law a measure allowing judges to take away weapons from people suffering mental health or other problems. He also extended a 72-hour waiting period to cover all gun purchases. But he vetoed legislation requiring the state licensing of firearms dealers, saying it would burden small businesses.
WHAT ARE THE SOURCES OF ILLEGAL CHICAGO GUNS?
According to the Trace Report, about 40 percent of illegally used or possessed firearms recovered in Chicago from 2013 to 2016 came from dealers in Illinois. The remaining 60 percent came from states with less regulation over firearms. Indiana accounted for about 1 in 5 of these weapons, followed by Mississippi and Wisconsin. The report says these trends have been consistent over the past decade. In the same time span, seven gun or sporting goods stores in Illinois were the top 10 source dealers of recovered weapons in Chicago. Three others were in Indiana.