Police currently have an APB manhunt for some 29-year-old guy named Travis Reinking in the Memphis, Tennessee area, who shot 4 people in a Waffle House. He is reportedly still armed with a hunting rifle and a handgun. Neither of which are an assault weapon.

There's at least half aa dozen other school or business shootings done in the last two months or so. And none of those were done with "assault rifles" either. So the legislation, while feel-good for the Left, is arguably having no actual effect of gun crime.

Except for the true purpose, which is to form a beach-head toward the ban of ALL guns. Which even then would have no effect on actual crime.
Only about 25% of U.S. citizens own guns.
Even with the most stringent of background checks, gun restrictions would have virtually no effect on gun crime.

Because as said above, 78% of guns used in crimes are borrowed from friends, borrowed from family (with or without permission), are traded for drugs, or purchased on the black market. So what does gun legislation actually do, it disarms and restricts the honest people who go through the retail process, and NOTHING to the ones who actually commit crimes.