In many cases, tighter gun control laws would make it more difficult for criminals to obtain firearms. Expanding background checks on all gun sales would make it tougher for criminals to legally buy weapons. Yes, there would still be a black market where guns are sold; however, law enforcement could focus more attention to these illegal gun sales.
Yes, stricter gun control laws make it more difficult for criminals to obtain firearms. It does not make sense to believe that it would be as easy for criminals to obtain firearms if there were stricter gun control laws. Stricter gun control laws may help to keep people safe and curb mass shootings.
Stricter gun laws will prevent criminals from obtaining guns because there will be fewer guns to get. They will have to work harder to get guns, because they will not be able to grab them from as many people or get them through legal means. They will have to be more determined.
Stricter gun control laws will not keep criminals from getting guns. In countries where guns are outlawed, the outlaws still have guns, because there is always someone who is willing to sell them illegally. What it may do is make illegal guns much more expensive due to scarcity, which will keep those who can't afford the prices from getting guns.