From FEE:

If we take the time to look at the raw data provided by the FBI, we find that all rifles, not just “assault-style rifles,” constitute on average 340 homicides per year from 2007 through 2017 (see Figure 1.). When we adjust these numbers to take under-reporting into account, that number rises to an average of 439 per year.

In any given year, for every person murdered with a rifle, there are 15 murdered with handguns, 1.7 with hands or fists, and 1.2 with blunt instruments. In fact, homicides with any sort of rifle represent a mere 3.2 percent of all homicides on average over the past decade.